noun
endometrial cyst; endometrioma; chocolate cyst
Medical term for a cyst formed by endometrial tissue, often found in the ovary. 'Chocolate cyst' is a common clinical nickname due to its dark, old-blood content.
内膜症性嚢胞は、子宮内膜症が卵巣に発生したものです。
An endometrial cyst is one that arises from endometriosis in the ovary.
超音波検査で内膜症性嚢胞が見つかりました。
An endometrial cyst was found on ultrasound.
Compound of 内膜症 (endometriosis) + 性 (-ic, of that nature) + 嚢胞 (cyst).