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REVIEW
CytoJournal 2005,  2:12

Fine-needle aspiration of the thyroid: an overview


1 Department of Laboratory Medicine and Pathology, University of Alberta Hospital, Edmonton, Alberta, Canada
2 Department of Medicine (Endocrinology and Metabolism), University of Alberta Hospital, Edmonton, Alberta, Canada

Date of Submission19-May-2005
Date of Acceptance29-Jun-2005
Date of Web Publication29-Jun-2005

Correspondence Address:
Mark W Lee
Department of Laboratory Medicine and Pathology, University of Alberta Hospital, Edmonton, Alberta
Canada
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© 2005 nguyen et al; licensee Cytopathology Foundation Inc.This is an open-access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


PMID: 15987502

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 » Abstract 

Thyroid nodules (TN) are a common clinical problem. Fine needle aspiration (FNA) of the thyroid now is practiced worldwide and proves to be the most economical and reliable diagnostic procedure to identify TNs that need surgical excision and TNs that can be managed conservatively. The key for the success of thyroid FNA consists of an adequate or representative cell sample and the expertise in thyroid cytology. The FNA cytologic manifestations of TNs may be classified into seven working cytodiagnostic groups consisting of a few heterogenous lesions each to facilitate the differential diagnosis. Recent application of diagnostic molecular techniques to aspirated thyroid cells proved to be useful in separating benign from malignant TNs in several cases of indeterminate lesions.



How to cite this article:
Nguyen GK, Lee MW, Ginsberg J, Wragg T, Bilodeau D. Fine-needle aspiration of the thyroid: an overview. CytoJournal 2005;2:12

How to cite this URL:
Nguyen GK, Lee MW, Ginsberg J, Wragg T, Bilodeau D. Fine-needle aspiration of the thyroid: an overview. CytoJournal [serial online] 2005 [cited 2014 Nov 24];2:12. Available from: http://www.cytojournal.com/text.asp?2005/2/1/12/41259



 » Review Top


Fine-needle aspiration (FNA) for cytologic evaluation of thyroid cancer was originally used by Martin and Ellis at New York Memorial Hospital for Cancer and Allied Diseases in 1930 [1]. However, this diagnostic procedure was subsequently found to have a limited value, and it was then discontinued at the above-mentioned institution [2,3]. The thyroid FNA was not further developed and did not gain acceptance in the United States for nearly 50 years until the early 1980s when its diagnostic value was firmly demonstrated by Scandinavian investigators [4-8]. The 1974 report by Crockford and Bain [9] and the 1979 paper of Miller and Hamburger [10] were apparently the first North American publications attesting to the value of thyroid FNA. This method of clinical investigation now is practiced worldwide and has become the cornerstone in the management of thyroid nodules (TN) [11-25].


 » Indication and Goal of Thyroid FNA Top


Thyroid nodular lesions are a common clinical problem. In the United States, 4 to 7% of the adult population have a palpable TN [13]. The incidence of thyroid cancer in a clinically solitary TN or in a multinodular goiter is equal and about 5% in non-endemic areas [26]. TNs constitute the main indication for FNA, and the goal of this diagnostic procedure is to detect thyroid neoplasms for surgical resection and to identify non-neoplastic lesions that may be managed conservatively [23]. This method of clinical investigation has reduced the number of diagnostic thyroid surgeries for TNs by 60-85%, and the difference in rates of thyroid surgery reflect the cytodiagnostic accuracy rates among different medical centers [24].


 » Contraindications and Complications of Thyroid FNA Top


The main contraindication to thyroid FNA is bleeding diathesis, as the formation of a large hematoma at the biopsy site may cause compression of the trachea and respiratory distress [13,23]. Therefore, a bleeding time, PT and PTT should be ordered to screen this condition in all patients prior to thyroid FNA. This diagnostic procedure, if properly performed, is almost free of complications. Subcutaneous hematoma at the biopsy site, accidental puncture of the trachea and local infection are rare complications [13]. Hematoma may be prevented by local pressure of the overlying skin at the biopsy site [13]. Tracheal injury is manifested by minimal and transient hemoptysis. Seeding of thyroid cancer cells along the needle tract is also an exceedingly rare complication with FNA [13].


 » Procuration and Preparation of Cell Samples Top


1. Procurement of cell samples

Obtaining an adequate or satisfactory cell sample for cytologic evaluation is not simple, and interpreting thyroid cytology is challenging and requires expertise [13,23]. To perform thyroid FNA, the TN is identified by palpation, and a 22- to 25-gauge and 4.5-cm-long needle is commonly used to procure cell samples from at least three different areas of any TN. Usually, only dermal anesthesia is required. Depending on personal preferences FNA of a TN may be performed either with or without a syringe [13]. However, for cystic thyroid lesions, the cyst contents should be evacuated first by FNA with a syringe. The gland is then carefully examined by palpation. If a residual nodule is found, it should be aspirated. If the TN is difficult to identify by palpation the patient should be referred to a radiologist for FNA under ultrasonographic guidance [13,22-24]. Since the thyroid is rich in capillary blood vessels the needle aspirate usually contains a large amount of peripheral blood that may be reduced by limiting the biopsy procedure to about five seconds or by using the FNA technique without aspiration [13].

2. Preparation of cell samples

For cytological evaluation, smears should be appropriately prepared and stained. Depending on the amount and nature of the thyroid needle aspirates one of the following preparation techniques is used: (a). A small drop of thyroid aspirate is put near the frosted end of a glass slide and is quickly and gently smeared by a cover slip. (b). A small drop of thyroid aspirate is put on a glass slide and gently crushed with a second slide that is then separated vertically from the first one. (c). A small or medium-sized drop of thyroid aspirate is put near the frosted end of a slide that is placed on a table. A second slide is used to spread the aspirated material in the same manner used to prepare a peripheral blood smear. (d) Cytospin smears should be prepared from the liquid contents of all cystic thyroid lesions. (e). Excess of aspirated material should be used for preparation of a cell block that may show diagnostic tissue fragments on sectioning. It is important that a small drop of aspirated material is used for smear preparation, as if a large drop of aspirate material is used, an unevenly thick smear may be obtained, and at the end of the slide a thick and bloody cell film may be formed. This will obscure the cellular details of underlying thyroid cells and tissue fragments, making their evaluation extremely difficult, if not impossible.

3. Routine staining methods

Depending on personal preference, either air-dried and Romanowsky-stained smears or ethanol-fixed and Papanicolaou-stained smears are prepared. For Papanicolaou staining, the smears must be fixed quickly before drying with 95% ethanol or with a commercial spray fixative. A delay in fixation will result in air-dried artefactual changes with loss of cellular details. Air-dried smears for staining with one of the Romanowsky modified methods (Wright stain, May-Grunwald-Giemsa or Diff-Quik method) now are widely used, as air-drying artifactual changes can be avoided. However, nuclear details in Romanowsky-stained smears are not as well-visualized as in wet-fixed and Papanicolaou-stained smears. A parallel use of air-dried and wet-fixed smears is usually recommended, as these two staining methods are complementary [13, 22, 23]. Fixation of aspiration smears in Carnoy solution for 3-5 minutes may be used to lyse red blood cells prior to staining with the Papanicolaou method.


 » Specimen Adequacy Top


Obtaining an adequate cell sample is a prerequisite to the success of thyroid cytology. Therefore, immediate microscopic assessment of the needle aspirate by a pathologist or a cytotechnologist is desirable. If the first sample is judged inadequate for cytological evaluation, the TN can be re-aspirated immediately. If a rapid evaluation is not available, multiple FNAs of different areas of the TN should be performed.

The range of inadequate or unsatisfactory specimens reported in the literature ranges from 2-21% (means 17%) [15]. Currently, criteria for specimen adequacy vary from institution to institution. Some investigators require that an adequate sample should contains five to six groups of well-preserved and well-visualized follicular cells with each group containing 10 or more cells [12]. One group requires multiple punctures of the TN to be evaluated, with at least six properly prepared smears and a minimum of 8-10 tissue fragments of well-preserved follicular epithelium on each of two slides [25]. Another group requires 10 clusters of follicular cells with at least 20 cells in each cluster [13]. The Papanicolaou Society of Cytopathology Task Forces on Standard of Practice does not specify any numbers and groups of thyroid follicular epithelial cells for specimen adequacy [23]. Two practical exceptions to these adequacy criteria are applied: (a) a benign colloid nodule may be suggested if a large amount of thick colloid material is present, regardless of the number of follicular epithelial cell clusters [23]; or, (b) if a cell sample contains one or two small clusters of malignant or highly atypical cells, it should be reported as malignant or suspicious for malignancy and not as unsatisfactory or inadequate for cytodiagnosis [23]. Thyroid FNA under ultrasonographic guidance achieved higher rates of adequate cell samples, in the range of 79-99.3% (mean, 91%) [21,27-36]. Ultrasound-guided thyroid FNA proved to be useful in sampling TNs smaller than 2 cm in greatest dimension, complex or solid-cystic TNs [27-36] and abnormal thyroid beds [35,36].


 » Cytodiagnosis and Its Limitations Top


The cytodiagnosis of TNs by FNA is complex for the following reasons [26]:

  1. overlap of cytological patterns between neoplastic and non-neoplastic lesions.
  2. overlap of cytological features between various neoplasms.
  3. coexistence of non-neoplastic and neoplastic processes and multiple malignancies in the same gland.


For a practical diagnostic approach, the cytological findings of thyroid lesions may be divided into seven main groups, as recommended by the Papanicolaou Task Force on Standard of Practice [23]. These groups are heterogenous and consist of both neoplastic and non-neoplastic lesions that may show either similar or specific cytological manifestations [23]. A non-diagnostic group is added as some TNs yield inadequate or non-specific cytological findings. The above-mentioned groups with their commonly encountered thyroid lesions are tabulated in [Table 1].

1. Benign Colloid Nodule

This group includes solitary benign colloid nodules and prominent benign colloid nodules in a multinodular colloid goiter . These lesions arecharacterized by abundant, thick colloid material with cracking or bubble pattern [Figure 1] and [Figure 2] and sheets of benign follicular epithelial cells in honeycomb arrangement [Figure 3]. Clusters of slightly hyperplastic Hurthle cells may be present [12, 22, 23, 25]. The cytological differential diagnosis between a benign colloid nodule and a macrofollicular adenoma of the thyroid is extremely difficult if not impossible, as the two lesions usually show abundant, thick colloid and similar follicular cells [22,23].

2. Cellular Microfollicular Lesion

This group includes hyperplastic microfollicular nodules in a multinodular colloid goiter or Hashimoto thyroiditis, a microfollicular adenoma , and a well-differentiated follicular carcinoma . These lesions are the most challenging ones to diagnose cytologically [22-25]. They are commonly reported as a microfollicular lesion or tumor with a recommendation for surgical excision [13,22-24]. FNA from a microfollicular lesion usually reveals abundant follicular cells in clusters, acini and small monolayered sheets [Figure 4] and [Figure 5]. The individual cells show scanty, ill-defined cytoplasm and oval nuclei with regular nuclear contours and inconspicuous or prominent nucleoli.

Cellular microfollicular lesions of the thyroid fall into the diagnostic category of indeterminate or suspicious lesions [14, 15, 22], and in one large series 14% of microfollicular lesions were malignant [12].

3. Hurthle Cell Lesion

Diagnosis of Hurthle cell lesions is a challenge in thyroid cytology. A hyperplastic Hurthle cell nodule in a Hashimoto thyroiditis or in a multinodular colloid goiter and a Hurthle cell neoplasm display similar cytologic findings [22-25, 37, 38]. The presence of numerous lymphocytes or a large amount of thick colloid material in the needle aspirate may indicate a hyperplastic Hurthle cell nodule in Hashimoto disease or a multinodular colloid goiter, respectively [38]. Hurthle cell adenoma and carcinoma usually show similar cytologic findings that are characterized by sheets and clusters of polygonal epithelial cells with abundant, granular, eosinophilic or basophilic cytoplasm, oval nuclei with regular nuclear contours and conspicuous or inconspicuous nucleoli [22-25] [Figure 6] and [Figure 7]. The presence of syncytial clusters of Hurthle cells with or without prominent nuclei [25] and abundant naked tumor cell nuclei has been reported to be a feature of Hurthle cell carcinoma [38].

When a Hurthle cell lesion is detected by FNA, surgical excision is usually indicated for further histologic study [38]. Thyroid Hurthle cell lesions fall into the cytodiagnostic category of indeterminate lesions or suspected malignant lesions [14, 15, 22], and 13% of Hurthle cell lesions were malignant in one large series [12].

4. Primary Malignant Lesions

This group includes papillary, high-grade follicular, insular, medullary and anaplastic carcinomas , and lymphoma . These lesions commonly show distinctive cytologic features that permit a correct identification in the majority of cases [13, 24, 25]. An insular carcinoma , or poorly differentiated carcinoma yields small cells in clusters, similar to those of a high-grade microfollicular carcinoma [39].

4a. Papillary carcinoma (PC). The conventional PC is characterized in FNA by the presence of thick or thin papillary tissue fragments with fibrovascular cores, sheets of tumor cells showing focal nuclear crowding and overlapping, irregular nuclear contours, intranuclear cytoplasmic inclusions (INCI) and nuclear grooves (NG). Psammoma bodies and metaplastic squamous cells may also be present [13, 22, 24, 25] [Figure 8],[Figure 9],[Figure 10],[Figure 11],[Figure 12],[Figure 13]. These nuclear changes are recognized with less difficulty in Papanicolaou-stained cell samples, but they may be difficult to identify in cell samples stained with the Romanowsky staining method [13, 22, 23]. However, a presence of minute true papillary tissue fragments with fibrous vascular cores even without the identifiable above-mentioned nuclear changes is indicative of a PC. These papillary tissue fragments should be differentiated from thick and large follicular epithelial cell clusters with vascular transgression that may be found in FNA from different types of non-papillary epithelial neoplasms of the gland [40].

- Micro- and macrofollicular PCs constitute a diagnostic challenge. A microfollicular PC may show in FNA follicular cells forming acini similar to those seen in the aforementioned cellular microfollicular lesions, and a macrofollicular PC may be easily mistaken for a macrofollicular adenoma or a benign colloid nodule cytologically, as nuclear changes characteristic for a thyroid PC may not be seen [41-43] [Figure 14].

- Hyalinizing trabecular adenoma is indistinguishable from a PC cytologically, as these two lesions yield cells with similar nuclear features [44]. Recent molecular studies have suggested that this tumor is actually an encapsulated trabecular variant of thyroid PC [45].

- Other PC carcinoma subtypes . Tall-cell PC is characterized by the presence of tall tumor cells with well-defined, granular cytoplasm and nuclei with NGs and single or multiple INCIs, making at least 30% of the aspirated cells [46-51] [Figure 15]. Columnar-cell variant shows no classic cytologic features of thyroid PC, but presence of clusters of columnar cells with palisading nuclei and the absence of classic nuclear changes of thyroid PC are cellular features of this neoplasm [52]. Diffuse sclerosing variant can be confidently suggested when abundant squamous cells admixed with lymphocytes, follicular epithelial cells with nuclear features of papillary carcinoma and a few psammoma bodies are noted [53,54] [Figure 16].

4b. A high-grade follicular carcinoma and insular carcinoma are characterized by sheets and acinar clusters of pleomorphic epithelial cells with prominent nucleoli [22, 24, 25].

4c. A medullary carcinoma shows in FNA a mixture of single and clustered polygonal cells and spindle tumor cells that may display INCIs [22, 24, 25] [Figure 17] and [Figure 18]. The tumor cells cytoplasm may show intracytoplasmic pink azurophil granules that are well-visualized by MGG or Diff-Quik stain and stain positively with calcitonin antibody. Amyloid material that stains positively with Congo red may be seen [Figure 19].

4.d. A naplastic thyroid carcinoma consists of two main histologic variants: Giant cell and spindle cell-subtypes . Depending on the histologic subtype, an anaplastic thyroid carcinoma may display in FNA pleomorphic large, bizarre cancer cells with prominent nucleoli or spindle cancer cells admixed with a variable amount of necrotic debris [Figure 20] and [Figure 21].

4.e. A primary thyroid non-Hodgkin lymphoma is usually of large cell type and yields in FNA cells similar to those of a lymph node involved by the same neoplastic process. A thyroid Hodgkin disease is characterized by  Reed-Sternberg cells More Details admixed with benign lymphoid cells and eosinophils [13, 24, 25].

5. Cystic Lesion

Benign cysts account for the majority of thyroid cystic lesions. They are formed as the result of hemorrhagic degeneration of a benign colloid nodule. FNA from a benign colloid cyst may show colloid material admixed with benign follicular epithelial cells and hemosiderin laden macrophages. However, any thyroid neoplasm may undergo hemorrhagic necrosis and become a cystic lesion [13,22-25]. Of the thyroid neoplasms, PC tends to undergo marked hemorrhagic degenerative change. FNA from the tumor commonly shows a large amount of blood and the cystic lesion tends to recur rapidly [23]. Cytological examination of the aspiration smears usually reveals a large amount of blood and rarely tumor cells. However, sections from the cell block prepared from the needle aspirate may show diagnostic papillary tissue fragments with fibrovascular cores or nuclear features of a PC [23] while that of a benign colloid nodule will show no true papillary tissue fragments with fibrovascular cores or nuclear features of a thyroid PC [Figure 22] and [Figure 23].

6. Thyroiditis

Hashimoto thyroiditis and subacute thyroiditis commonly have fairly distinctive clinical findings. Rarely, these lesions may present as a nodular lesion mimicking a thyroid neoplasm. Hashimoto thyroiditis is characterized by the presence of numerous benign lymphoid cells admixed with benign follicular cells and Hurthle cells, [Figure 24] and [Figure 25]. A subacute thyroiditis may yield clustered epithelioid cells, scattered lymphocytes and a few multinucleated giant cells containing up to one hundred nuclei [13,22-25,37] [Figure 26] and [Figure 27].It should be born in mind that Hashimoto thyroiditis may harbor hyperplastic follicular and Hurthle cell nodules, and these two nodules are cytologically indistinguishable from a cellular follicular neoplasm and a Hurthle cell neoplasm, respectively [37,38]. Surgical excision of these lesions is usually required for histologic confirmation.

7. Other Lesions

Graves disease may rarely present as a nodular thyroid lesion [55]. It yields non specific cytologic findings [13].

Metastatic cancers to the thyroid are common in patients with advanced cancers arising from other body sites [25]. However, metastatic cancer to the thyroid gland presenting as a palpable TN is uncommon. For unknown reasons, renal cell carcinoma is the most common metastatic neoplasm to the thyroid, and cases of clinically occult renal cell carcinoma presenting initially as a large thyroid mass have been documented [25]. Cytodiagnosis of metastatic cancer to the thyroid is relatively straightforward as metastatic cancer usually displays a cytologic pattern distinctive from those of a primary thyroid carcinoma [25]. However, a cytological differential diagnosis between a metastatic renal cell carcinoma of clear cell type and a primary thyroid carcinoma with clear cell change may be difficult, and immunocytochemical staining of aspirated tumor cells with thyroglobulin antibody will be helpful to identify the aforementioned primary thyroid cancer.

8. Non-Diagnostic Category

The lesions in this category are highly diversified and may be any lesions listed in the above seven categories. In this category the FNA yields non-diagnostic or inadequate cellular materials. In one study, cystic thyroid lesions yielded non-diagnostic cell samples at initial FNA in about 50% of cases [12]. In the Mayo Clinic experience, repeating the FNA in the cases with initial non-diagnostic needle aspirates revealed diagnostic material in 30 to 80% of cases [12,15]. Other investigators found that thyroid re-FNA was of limited value [59]. If the re-aspiration is still non-diagnostic, ultrasound-guided FNA should be performed. Ultrasound-guided FNAs yield adequate cytologic materials in about 91% of cases [27-36]. Patients with no specific risk factors for thyroid malignancy and a non-diagnostic FNA who refuse a re-biopsy may be managed conservatively. While patients in the high-risk group should have their TNs removed for histologic study, an increase in nodule volume alone is not a reliable predictor of malignancy, as most solid and benign TNs grow in size [57].


 » Diagnostic Accuracy and Errors Top


In a review of seven large series totaling 18,183 thyroid FNAs, Gharib and Goellner found that the biopsy technique had a sensitivity rate varying from 65 to 98% (mean 83%), and that its specificity rate varied from 72 to 100% (mean 92%) [15]. The false-negative rate varied from 1 to 11.5% (mean, 5.2%), and the false-positive rate varied from 0 to 7.7% (mean, 2.9%) [15]. The overall cytodiagnostic accuracy rate of thyroid FNA approached 95% according to some reported series [13].


 » Adjunctive Diagnostic Value of Ancillary Techniques Top


Ultrafast Papanicolaou stain selectively swells the nuclei of papillary thyroid carcinoma, making their nuclear grooves disappear and making the swollen nuclei look like "watery grapes", while this staining method has no effect on nuclei of a follicular adenoma [21]. This artifactual change is due to the disorganization of nuclear lamins and permits a confident distinction between a follicular adenoma and a follicular variant papillary carcinoma [21]. Immunostaining with thyroid peroxidase antibody has been reported to be of value in distinguishing these two lesions, as malignant and benign follicular cells commonly stain negatively and positively with this antibody, respectively [58].

Ploidy determination has no value in distinguishing a follicular adenoma from a follicular carcinoma [59-62] and immunostaining for p53, Ki-67 and Bcl-2 has no value in separating benign from malignant Hurthle cell tumors [63].

Genetics-molecular studies have been extensively carried out on tissue samples of different types of thyroid neoplasm since the past decade [64]. However, only a few genetics-molecular studies on thyroid cells obtained by FNA have been recently published. Human telomerase reverse transcriptase (hTERT) gene expression, using reverse transcriptase-polymerase chain reaction, has been identified as a promising diagnostic marker in distinguishing benign from malignant tumors in materials obtained by FNA. It was found that 90 and 92.8% of thyroid carcinomas were positive for hTERT while 35 and 61.5% of benign thyroid nodules were positive for hTERT, respectively [65,66]. Among the thyroid tumors with positive hTERT, there were eight of eight papillary, two of two Hurthle cell and three of four follicular carcinomas [65]. BRAF point mutation and RET/thyroid PC rearrangements were found in 38% of thyroid PCs and refined the diagnosis of thyroid PC in five of fifteen cell samples that were considered either indeterminate or insufficient by cytology. No mutation was found in FNAs of follicular adenomas and non-toxic nodular goiters [67]. These molecular markers were of adjunctive diagnostic value when the FNA diagnosis of TN was equivocal [65-67].

Powerful molecular techniques including microarray analysis and molecular profiling may have a significant role in the future evaluation of TNs, while providing impetus for further insight into the molecular pathogenesis of both benign and malignant TNs [68-71]. Moreover, such techniques may allow deeper insight into both loss and gain of function of unidentified genes by examining panels of genes rather than one or a limited number of potential gene candidates. By analysis of cancer gene profiles for a cohort of 62 thyroid samples, Finley et al [68] were able to distinguish between benign and malignant thyroid tumors. They reported a sensitivity of 91.7% and specificity of 96.2% for the detection of thyroid carcinomas of various types, including thyroid PC and its follicular variant and follicular carcinoma [68]. Distinction of benign and malignant thyroid tumors and molecular classification of follicular thyroid tumors by gene profiling suggests that these powerful techniques may have significant diagnostic potential when used with FNA cytology [69,70]. Molecular profiling may also permit the distinction between primary and metastatic malignancies when dealing with multiple suspicious nodules at various sites. Using material retrieved by FNA, Schoedel et al [71], compared loss of heterozygosity (LOH) patterns and demonstrated genetic kinship of multifocal carcinomas in the thyroid and a separate nodule in the lung, supporting a diagnosis of metastatic thyroid carcinoma to the lung rather than an independent lung neoplasm.

At present, techniques such as microarray analysis are limited by the amount of RNA that can be retrieved from a sample, thereby often limiting analysis to surgically resected samples. However, refinement of these techniques may make them applicable to FNA, with extraction of RNA from a cell block from which molecular analysis of FNA material may have significant diagnostic benefit.


 » Acknowledgements Top


Co-editors of Cytojournal Vinod B. Shidham, MD, FRCpath, FIAC, and Barbara F. Atkinson, MD thank the academic editor: Zubair W. Baloch, MD, PhD.

Hospital of the University of Pennsylvania Pathology, 6 Founders, 3400 Spuce St, Philadelphia, PA 19104, USA Email: baloch@mail.med.upenn.edu.

 
 » References Top

1.Martin HE, Ellis EB: Biopsy by needle puncture and aspiration. Am Surg 1930, 92: 169-181.   Back to cited text no. 1    
2.Stewart FW: The diagnosis of tumors by aspiration. Am J Pathol 1933, 9: 801-812.   Back to cited text no. 2    
3.Frazell EL, Foote FW: Papillary carcinoma of the thyroid: a review of 25 years of experience. Cancer 1958, 11: 895-922.  Back to cited text no. 3    
4.Soderstrom N: Puncture of goiters for aspiration biopsy. A primary report. Acta Med Scand 1952, 144: 237-244.   Back to cited text no. 4    
5.Eihorn J, Franzen S: Thin needle biopsy in the diagnosis of thyroid disease. Acta Radiol 1962, 58: 321-336.   Back to cited text no. 5    
6.Persson PS: Cytodiagnosis of thyroiditis. Acta Med Scand (suppl) 1967, 483: 8-100.   Back to cited text no. 6    
7.Ljunberg O: Cytologic diagnosis of medullary carcinoma of the thyroid gland with special regard to the demonstration of amyloid in smears of fine needle aspirates. Acta Cytol 1972, 16: 253-255.   Back to cited text no. 7    
8.Lowhagen T, Sprenger E: Cytologic presentation of thyroid tumours inaspiration biopsy smear. A review of 60 cases. Acta Cytol 1974, 18: 192-197.   Back to cited text no. 8    
9.Crockford PM, Bain GO: Fine needle aspiration biopsy of the thyroid. Can Med Assoc J 1974, 110: 1029-1032.  Back to cited text no. 9    
10.Miller JM, Hamburger JI, Kini SR: Diagnosis of thyroid nodules by fine needle aspiration and needle biopsy. JAMA 1979, 241: 481-486.  Back to cited text no. 10    
11.Jayaram G: Fine-needle aspiration cytologic study of solitary thyroid nodules. Profiles of 308 cases with histologic correlation. Acta Cytol 1985, 29: 967-973.   Back to cited text no. 11    
12.Goellner JR, Gharib H, Grant CS, Johnson DA: Fine-needle aspirationcytology of the thyroid, 1980-1986. Acta Cytol 1987, 31: 587-590.   Back to cited text no. 12    
13.Nguyen GK, Ginsberg J, Crockford PM: Fine-needle aspiration biopsy cytology of the thyroid. Its value and limitations in the diagnosis and management of solitary thyroid nodules. Pathol Annu 1991, 25 (1) : 63-91.   Back to cited text no. 13    
14.Mazzaferri EL: Management of a solitary thyroid nodule. N Engl J Med 1993, 328: 553-559.  Back to cited text no. 14    
15.Gharib H, Goellner JR: Fine-needle aspiration biopsy of the thyroid; an appraisal. Ann Int Med 1993, 118: 282-289.  Back to cited text no. 15    
16.Komatsu M, Hanamura N, Tsuchiya S, et al .: Preoperative diagnosis of follicular variant of papillary carcinoma of the thyroid: discrepancy between image and cytologic diagnosis. Rat Med 1994, 12: 293-299.   Back to cited text no. 16    
17.Danese D, Centanni M, Farsetti A, Andreoli M: Diagnosis of thyroid carcinoma. J Exp Clin Cancer Res 1997, 16: 337-347.  Back to cited text no. 17    
18.Giovagnoli MR, Pisani T, Drusco A, et al .: Fine needle aspiration biopsy in the preoperative management of patients with thyroid nodules. Anticancer Res 1998, 18: 3741-3745.   Back to cited text no. 18    
19.Wong CK, Wheeler MH: Thyroid nodules: rational management. World J Surg 2000, 24: 934-941.  Back to cited text no. 19    
20.Werga P, Wallin G, Skoog L, Hamberger B: Expanding role of fine-needle aspiration cytology in thyroid diagnosis and management. World J Surg 2000, 24: 907-912.  Back to cited text no. 20    
21.Yang GC, Liebeskind D, Messina AV: Ultrasound-guided fine-needle aspiration of the thyroid assessed by Ultrafast Papanicolaou stain: data from 1135 biopsies with a two- to six-year follow-up. Thyroid 2001, 11: 581-589.  Back to cited text no. 21    
22.Orell S, Philips J: Broadsheet number 57. Problems in fine needle biopsy of the thyroid. Pathology 2000, 32: 191-198.  Back to cited text no. 22    
23.Papanicolaou Society of Cytopathology Task Force on Standard of Practice (Suen KC, Chair): Guidelines of the Papanicolaou Society of Cytopathology for the examination of fine-needle aspiration specimens from thyroid nodules. Mod Pathol 1996, 9: 710-715.   Back to cited text no. 23    
24.DeMay RM: The Art & Science of Cytopathology. In Aspiration cytology . Chicago, ASCP Press; 1996:703.   Back to cited text no. 24    
25.Kini SR: Guide to clinical aspiration biopsy. In Thyroid . New York, Igaku-Shoin; 1997.   Back to cited text no. 25    
26.McCall A, Jarosz H, Lawrence AM, Paloyan E: The incidence of thyroid carcinoma in solitary cold nodules and multinodular goiter. Surgery 1986, 100: 1128-1132.   Back to cited text no. 26    
27.Cochand-Priollet B, Guillausseau PJ, Chagnon S, et al .: The diagnostic value of fine-needle aspiration biopsy under ultrasonography in nonfunctional thyroid nodules: a prospective study comparing cytologic and histologic findings. Am J Med 1994, 97: 152-157.   Back to cited text no. 27    
28.Danese D, Sciacchitano S, Farsetti A, et al .: Diagnostic accuracy of conventional versus sonography-guided fine-needle aspiration biopsy of thyroid nodules. Thyroid 1998, 8: 15-21.  Back to cited text no. 28    
29.Sabel MS, Haque D, Velasco JM, Staren ED: Use of ultrasound-guided fine needle aspiration biopsy in the management of thyroid disease. Am Surg 1998, 64: 738-741.   Back to cited text no. 29    
30.Tollin SR, Mery GM, Jelveh N, et al .: The use of fine-needle aspiration biopsy under ultrasound guidance to assess the risk of malignancy in patients with a multinodular goiter. Thyroid 2000, 10: 235-241.  Back to cited text no. 30    
31.Braga M, Cavalcanti TC, Collaco LM, Graf H: Efficacy of ultrasound-guided fine-needle aspiration biopsy in the diagnosis of complex thyroid nodules. J Clin Endocrinol Metab 2001, 86: 4089-4091.   Back to cited text no. 31    
32.Hatada T, Okada K, Ishii S, Utsunomiya J: Evaluation of ultrasound-guided fine-needle aspiration biopsy for thyroid nodules. Am J Surg 1998, 175: 133-136.   Back to cited text no. 32    
33.Mittendorf EA, Tamarkin SW, McHenry CR: The results of ultrasound-guided fine-needle aspiration biopsy for evaluation of nodular thyroid disease. Surgery 2002, 132: 648-653.   Back to cited text no. 33    
34.Court-Payen M, Nygaard B, Horn T, et al .: US-guided fine-needle aspiration biopsy of thyroid nodules. Acta Radiol 2002, 43: 131-140.   Back to cited text no. 34    
35.Tambouret R, Szyfelbein WM, Pitman MB: Ultrasound-guided fine-needle aspiration biopsy of the thyroid. Cancer 1999, 87: 299-305.   Back to cited text no. 35    
36.Krishnamurthy S, Bedi DG, Caraway NP: Ultrasound-guided fine-needle aspiration biopsy of the thyroid bed. Cancer 2001, 93: 199-205.  Back to cited text no. 36    
37.Nguyen GK, Ginsberg J, Crockford PM, Villanueva RR: Hashimoto's disease. Needle aspiration cytology: diagnostic accuracy and pitfalls. Diagn Cytopathol 1997, 16: 531-536.  Back to cited text no. 37    
38.Nguyen GK, Husain M, Akin MRM: Diagnosis of benign and malignant Hurthle cell lesions of the thyroid by fine-needle aspiration biopsy cytology. Diagn Cytopathol 1999, 20: 261-265.   Back to cited text no. 38    
39.Nguyen GK, Akin MRM: Cytopathology of insular carcinoma of the thyroid. Diagn Cytopathol 2001, 25: 325-330.  Back to cited text no. 39    
40.Nguyen GK: Fine-needle aspiration cytology of oncocytic papillary thyroid carcinoma. Diagn Cytopathol 2000, 23: 402-405.  Back to cited text no. 40    
41.Mesonero CE, Jugle JE, Wilbur DC, Nayar R: Fine needle aspiration of macrofollicular and microfollicular subtypes of follicular variant papillary carcinoma of the thyroid. Cancer 1998, 84: 235-244.   Back to cited text no. 41    
42.Zacks JF, de las Morelas A, Beazley RM, O'Brian MJ: Fine-needle aspiration cytology diagnosis of colloid nodules versus follicular variant papillary carcinoma of the thyroid. Diagn Cytopathol 1998, 18: 87-90.   Back to cited text no. 42    
43.Balock ZW, Gupta PK, Yu GH, et al .: Follicular variant of papillary carcinoma. Cytologic and histologic correlation. Am J Clin Pathol 1999, 111: 216-222.   Back to cited text no. 43    
44.Akin MRM, Nguyen GK: Needle aspiration biopsy cytology of hyalinizing trabecular adenomas of the thyroid. Diagn Cytopathol 1999, 20: 90-94.   Back to cited text no. 44    
45.Cheung CC, Boemer SL, MacMillan CM, et al .: Hyalinizing trabecular tumor of the thyroid: a variant of papillary carcinoma proved by molecular genetics. Am J Surg Pathol 2000, 24: 1622-1626.   Back to cited text no. 45    
46.Ohori NP, Schoedel KE: Cytopathology of high-grade papillary thyroid carcinomas: tall cell variant, diffuse sclerosing variant and poorly differentiated papillary carcinoma. Diagn Cytopathol 1999, 20: 19-23.   Back to cited text no. 46    
47.Harach HR, Zusman SB: Cytopathology of tall-cell variant of thyroidpapillary carcinoma. Acta Cytol 1992, 36: 895-899.  Back to cited text no. 47    
48.Gamboa-Dominguez A, Candanedo-Gonzalez F, Uribe-Uribe NO, Angeles-Angeles A: Tall-cell variant of papillary thyroid carcinoma: A cytohistologic correlation. Acta Cytol 1997, 18: 672-676.  Back to cited text no. 48    
49.Bocklage T, DiTomasso JP, Ramzy I, Ostrowski ML: Tall-cell variant of papillary thyroid carcinoma: cytologic features and differential diagnostic considerations. Diagn Cytopathol 1997, 17: 25-29.  Back to cited text no. 49    
50.Solomon A, Gupta PK, LiVolsi VA, Baloch ZW: Distingishing tall-cellvariant of papillary thyroid carcinoma from usual variant of thyroid papillary carcinoma in cytologic specimens. Diagn Cytopathol 2002, 27: 143-148.  Back to cited text no. 50    
51.Nair M, Kapila K, Karak AK, Verma K: Papillary carcinoma of the thyroid and its variants: a cytohistologic correlation. Diagn Cytopathol 2002, 24: 167-173.   Back to cited text no. 51    
52.Ylagan LR, Dehner LP, Huettner PC, Lu D: Columnar cell variant of papillary thyroid carcinoma. Report of a case with cytologic findings. Acta Cytol 2004, 48: 73-77.   Back to cited text no. 52    
53.Caruso G, Tabarri B, Lucchi I, Tison V: Fine-needle aspiration cytology in a case of diffuse sclerosing carcinoma of the thyroid. Acta Cytol 1990, 34: 352-354.   Back to cited text no. 53    
54.Kumarasinghe MP: Cytopathologic features of diffuse sclerosing variant of papillary carcinoma of the thyroid. Report of two cases in children. Acta Cytol 1998, 42: 983-986.   Back to cited text no. 54    
55.Carnell NE, Valente WA: Thyroid nodules in Graves' disease: classification, characterization, and response to treatment. Thyroid 1998, 8: 571-576.  Back to cited text no. 55    
56.Merchant SH, Izquierdo R, Khurana KK: Is repeated fine-needle aspiration cytology useful in the management of patients with benign thyroid disease? Thyroid 2000, 10: 489-492.   Back to cited text no. 56    
57.Alexander EK, Hurwitz S, Heering JP, et al .: Natural history of benign solid and cystic thyroid nodules. Ann Intern Med 2003, 138: 315-318.   Back to cited text no. 57    
58.Christensen L, Blichert-Toft M, Brandt M, et al .: Thyroperoxidase (TPO) immunostaining of solitary cold thyroid nodule. Clin Endocrinology (Oxf) 2000, 53: 161-169.   Back to cited text no. 58    
59.Harlow SO, Duda RB, Bauer KD: Diagnostic utility of DNA content flow cytometry in follicular neoplasms of the thyroid. J Surg Oncol 1992, 50: 1-6.  Back to cited text no. 59    
60.Oyama T, Vickery AL Jr, Preffer FI, Colvin RB: A comparative study of flow cytometry and histologic findings in thyroid follicular carcinomas and adenomas. Human Pathol 1994, 25: 271-275.   Back to cited text no. 60    
61.Czyz W, Joensuu H, Pylkkanen , Klempi PJ: P53 protein, PCNA staining, and DNA content in follicular neoplasms of the thyroid. Pathol 1994, 174: 267-274.   Back to cited text no. 61    
62.Ryan JJ, Hay ID, Grant CS, et al .: Flow cytometric DNA measurements in benign and malignant Hurthle cell tumors of the thyroid. World J Surg 1988, 12: 482-487.   Back to cited text no. 62    
63.Muller-Hocker J: Immunoreactivity of p53, Ki-67, and Bcl-2 in oncocytic adenomas and carcinomas of the thyroid. Human Pathol 1999, 30: 926-933.   Back to cited text no. 63    
64.Baloch ZW, LiVolsi VA: Pathology of thyroid and parathyroid disease. In Sternberg's Diagnostic Surgical Pathology . 4th edition. Edited by: Mills SE, Carter D, Greeson JK, Oberman HA, Reuter V, Stoler MH. Lippincott Williams & Wilkins; 2004:558-619.   Back to cited text no. 64    
65.Liou MJ, Chan EC, Lin JD, Liu FH, Chao TC: Human telomerase reversetranscriptase (hTERT) gene expression in FNA samples from thyroid neoplasms. Cancer Lett 2003, 191: 223-227.  Back to cited text no. 65    
66.Umbrich CB, Conrad GT, Clark DP, et al .: Human telomerase reverse transcriptase gene expression and surgical management of suspicious thyroid tumors. Clin Cancer Res 2004, 10: 5762-5768.  Back to cited text no. 66    
67.Salvatore G, Giannini R, Faviana P, et al .: Analysis of BRAF point mutation and RET/PTC rearrangement refines the fine-needle aspiration diagnosis of papillary carcinoma. J Clin Endocrinol Metab 2004, 89: 5175-5180.   Back to cited text no. 67    
68.Finley DJ, Zhu B, Barden CB, Fahey TJ III: Discrimination of benign and malignant thyroid nodules by molecular profiling. Ann Surg 2004, 240: 425-436.  Back to cited text no. 68    
69.Mazzanti C, Zeiger Ma, Costouros NG, et al .: Using gene expression profiling to differentiate benign versus malignant thyroid tumors. Cancer Res 2004, 64: 2898-2903.  Back to cited text no. 69    
70.Barden CB, Shister KW, Zhu B, et al .: Classification of follicular thyroid tumors by molecular signature: results of gene profiling. Clin Cancer Res 2003, 9: 1792-1800.   Back to cited text no. 70    
71.Schoedel KE, Finkelstein SD, Swalsky PA, Ohori NP: Molecular profiling of primary and metastatic neoplasms in the lung using cytologic material obtained by fine-needle aspiration: report of two cases. Diagn Cytopathol 2004, 30: 342-346.  Back to cited text no. 71    


    Figures

  [Figure 1], [Figure 2], [Figure 3], [Figure 4], [Figure 5], [Figure 6], [Figure 7], [Figure 8], [Figure 9], [Figure 10], [Figure 11], [Figure 12], [Figure 13], [Figure 14], [Figure 15], [Figure 16], [Figure 17], [Figure 18], [Figure 19], [Figure 20], [Figure 21], [Figure 22], [Figure 23], [Figure 24], [Figure 25], [Figure 26], [Figure 27]
 
 
    Tables

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