Table 1. Classification of non-epithelial and miscellaneous gonadal tumours.

Sex cord-stromal tumours

Granulosa-stromal cell tumours

Granulosa cell tumour

Adult type

Juvenile type

Thecoma-Fibroma group

Thecoma

Fibroma-fibrosarcoma

Sclerosing stromal tumour

Sertoli-stromal cell tumours

Sertoli cell tumour

Stromal-Leydig cell tumour

Sertoli–Leydig cell tumour (androblastoma)

Sex cord-stromal tumours of mixed or unclassified type

Sex cord-tumour with annular tubules

Gynandroblastoma

Sex cord-stromal tumour, unclassified

Steroid cell tumours

Leydig cell tumours

Hilus cell tumour

Leydig cell tumour, non-hilar type

Germ cell tumours

Primitive germ cell tumours

Dysgerminoma

Yolk sac tumour

Embryonal carcinoma

Polyembryoma

Choriocarcinoma

Teratoma

Mature

Immature

Monodermal and highly specialised types

Mixed germ cell tumours

Germ cell sex cord-stromal tumours

Gonadoblastoma

Mixed germ cell-sex cord-stromal tumour

Miscellaneous ovarian tumours

Small cell carcinoma, hypercalcaemic type

Wilms tumour

Soft tissue tumours not specific to the ovary

Embryonal rhabdomyosarcoma

Adapted from Scully, 1987.