PMC4629693_01
(A) Hematoxylin-eosin (H/E), original magnification 10x. Well-circumscribed nodule with solid/lobular architecture. (B) H/E, original magnification 200x. Neoplasm characterized by solid growth of polygonal cells with eosinophilic granular cytoplasm. No evidence of mitosis and/or necrosis. (C) IHC polymeric horseradish peroxidase (HRP)-linker antibody, original magnification 200x. Neoplastic cells are positive (brown) for gonadal hormone a-inhibin immunostain. (D) IHC polymeric horseradish peroxidase (HRP)-linker antibody, original magnification 200x. Neoplastic cells are negative for vimentin immunostain.
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F1
Inhibin was expressed immunohistochemically and the index of proliferation (Ki67-MIB1) was <3% (Figure 1).
PMC4629693_02