頭皮下腫瘤にて発症し，硬膜病変を合併した悪性リンパ腫の1例

A Case of Subcutaneous Malignant Lymphoma with Dura Mater Lesion

Ⅰ．はじめに

　頭皮下腫瘤の診断は容易でないことが多く，その治療においても組織や局在，深部への浸潤により様々な治療戦略が練られる，場合によっては有茎皮弁による再建が必要な程の広範で大がかりな手術を要することもあり，術前診断は非常に重要である。今回われわれは頭皮下腫瘤と硬膜病変を合併した悪性リンパ腫の1例を経験したので若干の文献的考察を加え，その鑑別と治療について報告する，

A 63-year-old male was admitted to our hospital, complaining of a scalp mass located at the frontoparietal area of his head. He noticed that it had been growing for 2 months. The mass was elastic hard and non-moving. Computed tomography demonstrated a subcutaneous mass with low density and which was enhanced homogeneously. The skull just below the mass was slightly destroyed, but the structure remained. Magnetic resonance imaging (MRI) demon-strated a mass with low signal intensity on both the Ti weighted image and the 12 weighted image.