腹腔鏡補助下にて切除した成人後腹膜奇形腫の1例

Retroperitoneal teratoma treated by laparoscopy-assisted resection : a case report

◆要旨：患者は39歳，女性．胆石症の診断目的のCTにて後腹膜腫瘍を指摘されて来院した．CTおよびMRIにて腫瘍は石灰化を伴い内容は液状成分を示唆する所見であった．奇形腫の診断にて腹腔鏡補助下に腫瘍切除術を施行した．摘出標本の内部は囊胞性で黄白色の粥状成分と毛髪を含んでいた．病理組織学的所見では成熟奇形腫であり悪性所見は認めなかった．術後経過は良好で術後第10病日に退院した．成人の後腹膜奇形腫は比較的稀な疾患である．後腹膜奇形腫に対する腹腔鏡下手術は低侵襲であり有用な術式と考えられた．

　A 39-year-old woman was admitted to our hospital because a retroperitoneal tumor which had been incidentally detected by CT scan. CT and MRI revealed the tumor with calcification and its content suggestive of liquid. With a diagnosis of retroperitoneal teratoma, laparoscopy-assisted tumor resection was performed. Macroscopically, the specimen was a cystic tumor, consisting of white to yellowish pappy materials containing hairs. Pathological findings showed a mature teratoma without malignant findings. The postoperative course was uneventful and the patient was discharged from the hospital on the 10 th postoperative day.

　Retroperitoneal teratoma in an adult is relatively rare. Laparoscopic resection is a minimally invasive and useful method for retroperitoneal teratoma resection.