Abstract

Nephrogenic adenoma is a rare benign lesion of urothelial mucosa. Our case is an incidentally detected nephrogenic adenoma accompanied by bilateral hydronephrosis. A 59-year-old female. At cystoscopy, suspicious papillary lesion measuring 1 cm was observed on anteior wall of the bladder and transurethral resection was performed.Pathologically, the result was reported as nephrogenic adenoma (nephrogenic metaplasia). The urinary bladder is the most common location of nephrogenic adenom (68.6 %)and it is followed by the urethra (13.5 %),ureter (8.2%), renal pelvis (8.2%) and prostate (2%). Nephrogenic adenomas are strongly associated with chronic irritation or inflammation of the urinary tract. Other malign lesions should be distinguished immunohistochemically and histopathologically. It should be followed for concomitant malignant lesions and frequent local recurrences.