宮岡 洋一¹, 小瀬 和洋¹, 鈴木 重道¹, 真田 泰興¹, 藤村 二郎¹, 井上 和彦¹, 坂之上 一史¹, 香川 幸司¹, 菅沢 一子², 伊原 恵子²

Yoichi MIYAOKA¹, Kazuhiro KOSE¹, Shigemichi SUZUKI¹, Yasuoki SANADA¹, Jiro FUJIMURA¹, Kazuhiko INOUE ¹, Kazuhumi SAKANOUE¹, Koji KAGAWA¹, Kazuko SUGESAWA², Keiko IHARA²

¹松江赤十字病院内科, ²松江赤十字病院検査部腹部超音波検査室

¹Department of Internal Medicine, Matsue Red Cross Hospital, 200 Horo-machi, Matsue-shi, Shimane-ken 690-0886, Japan, ²Division of Abdominal Ultrasound, Matsue Red Cross Hospital, 200 Horo-machi, Matsue-shi, Shimane-ken 690-0886, Japan

キーワード : Diffusely infiltrating primary colorectal carcinoma , Ultrasonography

We used abdominal ultrasonography to examine a 65-year-old man who had abdominal pain after being admitted to this institution because of dermatomyositis. The examination showed the wall of the sigmoid colon to be diffusely thickened (maximum 7.8 mm). The layer between the mucosa (M) and the submucosa (SM) was blurred, but the layer between the SM and the muscularis propriae (MP) was distinct, and compressibility (degree to which the wall was compressed by the probe) was decreased. We thus suspected diffusely infiltrating sigmoid carcinoma. A barium-enema roentogenograph showed long-drawn stenosis and tapering margin in the sigmoid colon. Colonoendoscopy showed erosive and reddish mucosa and stenosis in the sigmoid colon. The biopsy revealed poorly differentiated adenocarcinoma. Diffusely infiltrating sigmoid carcinoma was confirmed on autopsy.