Nephrogenic adenomaの2例

Abstract

症例1は61歳男性で, 肉眼的血尿を主訴とした.膀胱鏡にて, 左側壁および膀胱頂部に乳頭状腫瘍(細胞診class2)を認めた.膀胱癌を疑ってTUR-Btを行い, 病理学的にnephrogenic adenomaで, 膀胱頂部の乳頭状腫瘍は移行上皮癌Gl, pTaであった.症例2は67歳男性で, 膀胱腫瘍に対してTUR-Btを行い, 病理学的に移行上皮癌Gl, pTaであった.術後2度の再発をきたしたため, 左腎盂腫瘍に対し左腎尿管全摘術を行った.その後, 膀胱頂部に乳頭状腫瘍(細胞診class2)を認めた.TUR-Btを行い, 病理学的にnephrogenic adenomaであった.両例とも移行上皮癌が再発しており, 厳重な経過観察が必要である.なお, 日本における膀胱nephrogenic adenomaの報告は自験例を含め41例である

Nephrogenic adenoma is a relatively rare, benign tumor of the urinary tract. We experienced two cases of nephrogenic adenoma originating in the bladder. The first patient was a 61-year-old man. Two papillary tumors were found on the bladder. Transurethral resection of the bladder tumor (TUR-Bt) was performed. The second patient was a 72-year-old man who had a history of TUR-Bt for the bladder tumor and a history of left nephroureterectomy for left ureteral tumor. Cystoscopy showed a papillary tumor on the top of the bladder wall and TUR-Bt was performed. In both cases, the histopathological diagnosis was the nephrogenic adenoma. Our cases are the 40th and 41st cases of the nephrogenic adenoma of the bladder reported in the Japanese literature.