{{Infobox medical condition (new) | name = Thecoma | synonyms = | image = thecoma high mag.jpg | caption = High magnification micrograph of a '''thecoma'''. H&E stain. | pronounce = | field = | symptoms = | complications = | onset = | duration = | types = | causes = | risks = | diagnosis = | differential = | prevention = | treatment = | medication = | prognosis = | frequency = | deaths = }} '''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.<ref name="pmid15327450">{{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 }}</ref>)
60% of patients present with abnormal uterine bleeding, and 20% have endometrial carcinoma.
==Pathologic features== [[Image:Thecoma low mag.jpg|thumb|left|Low magnification micrograph of a '''thecoma''' showing compression of the ovarian cortex (right of image). H&E stain.]] {{clear}} Grossly, the tumour is solid and yellow.
Grossly and microscopically, it consists of the ovarian cortex.
Microscopically, the tumour cells have abundant lipid-filled cytoplasm.
==References== {{reflist}} == External links == {{Medical resources | DiseasesDB = | ICD10 = | ICD9 = {{ICD9|220}} | ICDO = 8600 | OMIM = | MedlinePlus = | eMedicineSubj = | eMedicineTopic = | MeshID = D013798 | SNOMED CT = 52490000 }} {{Genital neoplasia}}
Category:Gynaecological neoplasia
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