平滑筋肉腫との鑑別に苦慮した，著明な扁平上皮化生を伴う子宮腺筋症の1例

A case of uterine adenomyosis with marked squamous metaplasia that was difficult to differentiate from leiomyosarcoma

画像診断的に平滑筋肉腫との鑑別が困難であった，著明な扁平上皮化生を伴う子宮腺筋症の1例を経験した。病理所見および文献的考察を加え報告する。

A 68-year-old woman with growing uterine mass mimicking apoplectic leiomyoma after menopause came to our institute. We suspected leiomyosarcoma on MR；however, pathological diagnosis revealed adenomyosis with squamous metaplasia. The extensive squamous metaplasia of the endometrium is known as ichthyosis. When it occurs in the ectopic endometrium within the adenomyosis, it may form large cysts filled with keratin that may be misinterpreted as uterine leiomyosarcoma.