Table 1. Immunohistochemical Markers
| Tumor Type | Beta-HCG | AFP | PLAP | c-kit |
| AFP = alpha-fetoprotein; HCG = human chorionic gonadotropin; PLAP = placental alkaline phosphatase. | ||||
| Choriocarcinoma | + | - | ± | - |
| Embryonal carcinoma | - | - | + | - |
| Germinoma (syncytiotrophoblastic) | + | - | ± | + |
| Immature teratoma | ± | ± | - | ± |
| Mature teratoma | - | - | - | - |
| Mixed germ cell tumor | ± | ± | ± | ± |
| Pure germinoma | - | - | ± | + |
| Yolk sac tumor | - | + | ± | - |
