Uric Acid Stone Formation Following Ileostomy*

Summary 1. Seventy‐two members of the Ileostomy Association of South Australia were reviewed and 9 (12.5 per cent) found to have associated urolithiasis. The majority of stones (5 out of 7 chemically analyzed) proved to be uric acid in nature. 2. The main aetiological factor would seem to be the loss of alkaline fluid and electrolytes from the ileostomy, resulting in the passage of persistently acid urine of low volume and high specific gravity. 3. Prevention may prove difficult and the importance of a properly functioning ileostomy without stenosis is stressed.