We encountered 6 patients with pyourachus (male, 1; female, 5) who ranged in age from 17 to 58 years (mean, 41 years) during the 7 years from 1993 to 1999. Three of them had a history of gynecological surgery, and 2 had a history of appendectomy. Improvement was observed in one patient with conservative therapy alone, but the other 5 patients underwent surgery. Preoperatively, 2 patients underwent drainage, one of them through the umbilicus, and the other through a position on the midline percutaneously. Pathological examination in the 5 patients revealed no evidence of cancer. With reference to postoperative complications, adhesive ileus was recognized in 1 case one year postoperatively but no other complications were noted in the other 5 cases. No evidence of recurrence has been seen in any of these patients to date.