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Figure 1: Composite photomicrographs of the tumor showing epithelioid cells arranged in a group with granular chromatins (a, FNA Pap stain, ×40 Obj.); pleomorphic nuclei with nucleoli (b, FNA Diff-Quick stain, ×100 Obj.); and cells with positive staining for synaptophysin (c, FNA, ×100 Obj.). The histological section of the tumor (d, H and E, ×40 Obj.) shows epithelioid or chief cells which are arranged in a pseudoalveolar pattern (Zellballen) nested in a vascular stroma which were positive for synaptophysin but negative for cytokeratin. Hyperchromatic spindle shaped sustentacular cells are at the periphery of the chief cell nests (arrows). They were only positive for S-100

Figure 1: Composite photomicrographs of the tumor showing epithelioid cells arranged in a group with granular chromatins (a, FNA Pap stain, ×40 Obj.); pleomorphic nuclei with nucleoli (b, FNA Diff-Quick stain, ×100 Obj.); and cells with positive staining for synaptophysin (c, FNA, ×100 Obj.). The histological section of the tumor (d, H and E, ×40 Obj.) shows epithelioid or chief cells which are arranged in a pseudoalveolar pattern (Zellballen) nested in a vascular stroma which were positive for synaptophysin but negative for cytokeratin. Hyperchromatic spindle shaped sustentacular cells are at the periphery of the chief cell nests (arrows). They were only positive for S-100