尿路結石症による巨大水腎症：症例報告

Giant hydronephrosis is defined as the presence of more than 1 L of urine within the renal collecting system, usually resulting from ureteropelvic junction obstruction caused by congenital anomaly or impacted ureteral calculus. We report the case of a 55 years old man who developed left sided giant hydronephrosis secondary to obstructive ureterolithiasis. The patient was initially treated with percutaneous nephrostomy, draining 18 L of urine. After confirmation of non functional kidney, nephrectomy was performed. This case is reported due to its rarity and to remind the urological community to consider this diagnosis in cases of large abdominal masses.