Wiktionary
gonadoblastoma
n. (context pathology oncology English) A tumour found in an ovary.
Wikipedia
Gonadoblastoma
A gonadoblastoma is a complex neoplasm composed of a mixture of gonadal elements, such as large primordial germ cells, immature Sertoli cells or granulosa cells of the sex cord, and gonadal stromal cells. Most gonadoblastomas are benign.