The following is an excerpt....
BASICS
Description
- Inflammation and/or perforation of diverticulum:
- Microscopic or macroscopic
- Uncomplicated vs. complicated
- Incidence increasing
Etiology
- Fecal material in diverticulum hardens, forming fecalith.
- Fecalith abrades mucosa or compromises blood supply, causing inflammation.
- Inflammation causes microperforation of bowel wall:
- Peridiverticulitis: Inflammation of wall not extending beyond serosa (uncomplicated diverticulitis)
- Pericolic abscess: Serosal perforation, yet inflammation remains localized (complicated diverticulitis)
- Peritonitis: Serosal perforation with generalized spread of inflammation (complicated diverticulitis)
- Uncomplicated diverticulitis:
- Colonic wall thickening
- Inflammatory changes (fat stranding on CT)
- Complicated diverticulitis:
- Abscess
- Bowel obstruction
- Fistulas after recurrent attacks
- Colovesical fistula (most common) presents with dysuria, frequency, urgency, pneumaturia, and fecaluria.
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