相馬 光宏¹, 岡野 重幸¹, 太田 知明¹, 北川 隆¹, 武藤 英二¹, 武田 章三¹, 長瀬 雅彦², 宮崎 隆男², 神田 誠², 岡村 毅与志³, 並木 正義³

Mitsuhiro SOHMA¹, Shigeyuki OKANO¹, Tomoaki OHTA¹, Takashi KITAGAWA¹, Eiji MUTOH¹, Shozou TAKEDA¹, Masahiko NAGASE², Takao MIYAZAKI², Makoto KANDA², Kiyoshi OKAMURA³, Masayoshi NAMIKI³

¹市立旭川病院内科, ²市立旭川病院中央検査科, ³旭川医科大学第3内科

¹Department of Internal Medicine, Asahikawa Municipal Hospital, ²Central Laboratory, Asahikawa Municipal Hospital, ³Third Department of Internal Medicine, Asahikawa Medical College

キーワード : Asymptomatic renal cell carcinoma, Ultrasonographic mass screening, Echo pattern

An asymptomatic renal cell carcinoma was incidentally detected in ten persons by ultrasonographic examination of the upper abdomen performed in 21,567 persons. One of them was detected by ultrasonography in a general health check, and another one was detected by ultrasonographic abdominal mass survey. Eight of them had complaints or diseases of digestive organs. The minimum tumor size was 15 mm in diameter. Eight cases were less than 50 mm in diameter. The histological stage was pT2a in one case, and pT2b in nine cases. Eight cases showed homogeneous pattern, and six cases showed hyperechoic pattern. Ultrasonographic mass screening seems to be useful for early detection of renal cell carcinoma.