Rare Association Between an Endometrioma and A Mature Cystic Teratoma on the Same Ovary in A Postmenopausal Woman: A Case Report and Review of Literature

This paper reports a rare postmenopausal case in which a symptomatic 59-year-old woman had a right bilocular ovarian mass on transvaginal ultrasound with features suggestive of an endometrioma (“ground glass” content) in one compartment and a complex cyst with papillary projections in the other. The patient underwent total hysterectomy with bilateral adnexectomy, and histopathology confirmed coexistence of an endometrioma and a mature cystic teratoma (dermoid cyst) within the same ovary; the authors note this is the only reported case of this specific association in a postmenopausal woman. A stated limitation is that the evidence is based on a single case and a literature review (found to include only six prior cases overall up to June 2019), limiting generalizability. This paper is centrally about endometriosis — specifically the co-existence of an endometrioma with a mature cystic teratoma in a postmenopausal patient.

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