During the last 5 years (July 1989-July 1994) two cases of peritonitis caused by perforeted jejunal diverticle at Achmad Mochtar General Hospital Bukittinggi were reported. Case1, male 75 years-old suffered from peritonitis and diabetes melitus. A perforated diverticle of jejunum was found during operation. There were 11 diverticles found at proximal jejunum, 30 cm from the treltz ligament and …