thecoma

{{Infobox medical condition (new)

| name = Thecoma

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| image = thecoma high mag.jpg

| caption = High magnification micrograph of a thecoma. H&E stain.

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Thecomas or theca cell tumors are benign ovarian neoplasms composed only of theca cells. Histogenetically they are classified as sex cord-stromal tumours.

They are typically estrogen-producing and they occur in older women (mean age 59; 84% after menopause). (They can, however, appear before menopause.{{cite journal |vauthors=Okada I, Nakagawa S, Takemura Y, etal |title=Ovarian thecoma associated in the first trimester of pregnancy |journal=J. Obstet. Gynaecol. Res. |volume=30 |issue=5 |pages=368–71 |date=October 2004 |pmid=15327450 |doi=10.1111/j.1447-0756.2004.00212.x |s2cid=28580115 }})

60% of patients present with abnormal uterine bleeding, and 20% have endometrial carcinoma.