colonic diverticulosis

acquired herniations of mucosa and muscularis mucosa through the muscularis propria with wall components of mucosa, submucosa, and serosa = false diverticula of propulsion type

lateral diverticula: arise between mesenteric and antimesenteric teniae on opposite sides
antimesenteric intertenial diverticula: through the weakness in the muscular wall where nutrient arteries pass
"giant sigmoid diverticulum": large gas-containing cyst (air entrapment secondary to ball-valve mechanism) arising in the left iliac fossa

see: diverticular disease of colon

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