Fecal Impaction and Stercoral Ulceration

 Pressure necrosis of bowel lumen (rectum or sigmoid) by fecal mass






IMAGING




• CECT to evaluate for perirectal and intraperitoneal complications
image Fecaloma: Entirely intraluminal mass

image Calcification or high-density matter in or around fecal mass

image Laminated, radiopaque mass of feces

image Focal thickening of bowel wall and pericolonic fat stranding (suggests stercoral colitis)

image Pneumatosis, free air (confirms perforation)


TOP DIFFERENTIAL DIAGNOSES




• Colon carcinoma
image Thickens wall of colon, narrows lumen

• Villous adenoma, colon
image Bulky but soft intraluminal and mural mass

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Nov 16, 2016 | Posted by in GASTROINTESTINAL IMAGING | Comments Off on Fecal Impaction and Stercoral Ulceration

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