Wiktionary
hyperthecosis
n. hyperplasia of the theca interna of the ovary
Wikipedia
Hyperthecosis
Hyperthecosis is hyperplasia of the theca interna of the ovary. It is when an area of luteinization occurs along with stromal hyperplasia. The luteinized cells produce androgens, which may lead to hirsutism and virilization (or masculinization).