骨盤内後腹膜Ancient schwannomaの1例

Abstract

59歳男.高血圧精査中のCT検査で, 骨盤内に腫瘤が認められた為, 精査目的で著者の病院に入院した.画像所見等からschwannoma, leiomyoma, sarcoma等の間葉系腫瘍を疑い, 腫瘍摘出術を施行した.摘出腫瘍の病理組織学的所見によりancient schwannomaと診断した.術後8ヵ月を経過し, 再発, 転移, 下肢知覚障害は認められず, 現在, 外来経過観察中である

We treated a case of retroperitoneal ancient schwannoma in the pelvis detected incidentally at a health examination without clinical manifestation in a 59-year-old Japanese man found to have hypertension. Computed tomography showed a heterogeneously enhanced 8 x 7 cm solid mass in the pelvic retroperitoneal space. Magnetic resonance imaging revealed an encapsulated tumor, showing a low intensity on the T1-weighted image, heterogeneously high intensity on the T2-weighted image and the tumor homogeneously enhanced with Gd-DTPA. It was suspected to be a mesenchymal tumor. The tumor was resected en bloc. The histologic examination of the extirpated tumor was an ancient schwannoma. A total of 11 retroperitoneal ancient schwannoma cases were reviewed.