尿嚢腫を形成した小児の水腎症腎実質自然破裂の1例

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3歳男児にみられた水腎症に伴う腎実質自然破裂例。腎実質破裂部の縫合閉鎖と腎盂形成術を施行し,術後,通過障害は改善されたPresented is a case report of spontaneous rupture of the renal parenchyma associated with urinoma. A 3-year-old boy had a history of transient gross hematuria followed by sudden onset of left flank pain. Echograms and computed tomographic (CT) scan revealed a left hydronephrotic kidney with perirenal urinoma which had a cyclic change in size corresponding to the pain. Left retrograde pyelogram showed stenosis of the ureteropelvic junction without extravasation of contrast medium. A pin-hole tear was detected in the middle of the left renal parenchyma on exploratory surgery. Left pyeloplasty and retroperitoneal drainage were performed. The postoperative course was satisfactory. Spontaneous rupture of the renal parenchyma, which is frequently caused by renal tumor, vascular disease and/or infection, seems to be seldom caused by increased renal intrapelvic pressure as in rupture of the renal pelvis.