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Figure 2: The smears from a 44-year-old male patient with a right parotid mass showed cellular smears with mostly single cells (a: Diff-Quik, ×100; b: Diff-Quik, ×400). Other areas of the smears showed some clusters of epithelial cells (c: Diff-Quik, ×100; d: Diff-Quik, ×400). The primary pathologist misinterpreted the background single cells as lymphocytes and misdiagnosed as “oncocytic neoplasm, favor Warthin tumor.” The follow-up surgical resection was acinic cell carcinoma

Figure 2: The smears from a 44-year-old male patient with a right parotid mass showed cellular smears with mostly single cells (a: Diff-Quik, ×100; b: Diff-Quik, ×400). Other areas of the smears showed some clusters of epithelial cells (c: Diff-Quik, ×100; d: Diff-Quik, ×400). The primary pathologist misinterpreted the background single cells as lymphocytes and misdiagnosed as “oncocytic neoplasm, favor Warthin tumor.” The follow-up surgical resection was acinic cell carcinoma