2456 in. of the ureter were resected and the proximal ureterThe immediate post-operative convalescence was brought round the rim of the true pelvis extraperi-stormy. The blood-urea rose to 230 mg. per cent, the toneally, along the line of the left common and external patient had urzemic fits, and the serum electrolytes iliac vessels, and a mucosa-to-mucosa anastomosis was became grossly abnormal. Serum sodium was 134 mEq./ litre, serum potassium 2.8 mEq./litre, serum chloride 109 mEq./litre, and carbon dioxide II mEq./litre. Urinary output then improved by the end of a fortnight and the blood-pressure and blood-urea levels returned almost to normal. On discharge to her home a month after the operation the child could hold her urine for I+ hours. There was no recurrence of anzemia and the blood-urea varied between 50 and 60 mg. per cent.