Microwave Tissue Coagulator（MTC）を使った体腔鏡下腎部分切除により腎盂狭窄をきたした１例

概要

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We report a case of the loss of the kidney function by the severe renal pelvic stricture after retroperitoneoscopic partial nephrectomy using Microwave Tissue Coagulator (MTC). Left renal tumor in a diameter of 2.5 cm was incidentally found in a 74-year-old man. Under the retroperitoneoscopy, normal kidney tissue 5 mm apart from the tumor was coagulated by MTC without renal pedicle clamping. The renal tumor was excised along the coagulated surrounding normal tissue. Convalescence was uneventful. Follow up CT and retrograde pyelography 4 months after the operation, however, showed severe stricture of the left renal pelvis, and the left renal function had been severely lost without any subjective symptoms. Renal pelvic stricture is a major complication of the laparoscopic partial nephrectomy using MTC.