悪性卵巣腫瘍との鑑別に苦慮した卵巣富細胞性線維腫の1例

A case report of ovarian cellular fibroma with cystic and hemorrhagic change mimicking malignant ovarian tumor

卵巣線維腫のうち，腫瘍細胞の密度が高く細胞異型が軽度な場合は，富細胞性線維腫と呼ばれる^1）。高い細胞密度を反映して拡散制限を呈し^3），ときに出血や嚢胞変性を伴う^4）。今回我々は，悪性卵巣腫瘍との鑑別に苦慮した卵巣富細胞性線維腫の症例を経験したので，若干の文献的考察を加えて報告する。

Ovarian cellular fibromas, approximately 10％ of ovarian fibromas, exhibit densely cellular proliferations of fibroblasts with mild nuclear atypia. The tumors show restricted diffusion on MRI due to its high cellularity and sometimes show degenerative change. Therefore, the preoperative diagnosis may be difficult. We describe a case of ovarian cellular fibroma with cystic and hemorrhagic change which mimics malignant ovarian tumor.