A Rare Localized Pituitary Stalk Germinoma Presenting in the Third Decade

Figure 2

Germinoma (left): large round germ cells (black arrows) within a background of lymphocytes (white arrow); H&E 200x, insert showing H&E 400x (right). A: C-kit (CD117) stains the membranes of neoplastic cells (400x). B: OCT-4 producing strong nuclear staining (400x). C: PLAP staining the membranes and the Golgi apparatus, blue arrows (400x). D: B-hCG staining isolated syncytiotrophoblastic cells (400x). B-hCG: human chorionic gonadotropin.