Fig. 2

Gross and histologic features of the ovarian cystic mass. a Dermoid components including hairs and sebaceous materials are evident and a brownish-black colored solid mass is also present within the cyst. b Most of the cystic mass comprises mature dermoid components (H&E stain, original magnification × 100). c The solid mass contains infiltrating nests of pleomorphic cells with prominent nucleoli and black pigments. Junctional activity is also present (H&E stain, original magnification × 400). d The pleomorphic cells show strong immunoreactivity to HMB-45 (original magnification × 400)