We report a rare case of chyluria following surgery for stomach cancer. A 75‒year‒old man underwent a partial gastrectomy with the Billroth I method and a cholecystectomy. He was referred to our department because of general fatigue, appetite loss, edema, and chyluria. His laboratory date revealed hypoalbuminemia, hyponatremia, and proteinuria. Cystoscopy showed a spout of chyluria from the left ureter orifice. We performed flexible ureteroscopy and observed a spout of chyluria from a large fistula in the left lower calyx. 2.5% hydrogen peroxide solution was injected toward the hole retrogradely, but it was ineffective. Retroperitoneoscopic left renal pedicle lymphatic disconnection was performed. The patient’s hypoalbuminemia, hyponatremia, proteinuria, and chyluria disappeared and his general fatigue, appetite loss, and edema improved postoperatively. By six months after the operation, he had had no recurrence of chyluria. Therefore, retroperitoneoscopic renal pedicle lymphatic disconnection is a useful and reliable treatment for intractable chyluria.
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