Current Survey DIVERTICULA OF COLON

DIvERTicuLA occur in the large bowel and are herniations of the mucous membrane through acquired defects in-the muscular coats-the small pouches being covered by serosa; exicept in the smallest sacs muscle fibres are only found in the neck. When first 'formed the necks are wide and the diverticula globular-later the necks become attenuated and the pouches flask shaped. The appendices epiploicae when heavily fat laden tend to obscure the diverticula. The diverticula iarise between the mesenteric and antimesenteric taeniae near the site of entry of the small perforating vessels, consequently diverticula are not found in the rectum where the longitudinal muscle is complete. The commonest site is the pelvic colo