Perforated Solitary Diverticulitis of the Transverse Colon

To the Editor .—We would like to mention a rare case of perforated solitary diverticulitis of the transverse colon mimicking acute appendicitis. Report of a Case A 43-year-old woman was admitted to the Kaiser Foundation Hospital, Los Angeles, with a history of 48 hours' periumbilical pain that later migrated to the right lower quadrant. A complete work-up preoperatively suggested the diagnosis of acute appendicitis. At surgery, the appendix was perfectly normal. All the other viscera were normal except the transverse colon, which was lying low, at a level below the umbilicus. In the middle third of the transverse colon was a phlegmonous mass involving the colon wall and pericolic fat with an adjacent small abscess along the mesenteric border. The rest of the transverse colon was normal. We elected to resect the middle third of the transverse colon, including the abscess near the mesentery, bringing out the proximal end as