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Stercoral colitis complicated with ischemic colitis: a double-edge sword

BACKGROUND

Stercoral colitis is a rare inflammatory process involving the colonic wall secondary to fecal impaction with high morbidity and mortality; especially if complicated with ischemic colitis, stercoral ulcer formation and subsequent perforation. There are several case reports published on abdominal perforation resulting from stercoral colitis. However, stercoral colitis complicated by ischemic colitis is rare. The purpose of this case report is to describe the potential challenges in the diagnosis and management of stercoral colitis with ischemic colitis.

CASE PRESENTATION

An 87 years old male with history of chronic constipation presents with severe abdominal pain to the emergency department. The patient was hemodynamically stable. On physical examination, the abdomen was mildly distended with moderate tenderness. Lab work was significant for leukocytosis and lactic acidosis. Abdominal CT scan revealed large amount of retained stool in the colon, bowel wall thickening and infiltration of peri-colonic fat, which were suggestive for stercoral colitis. Patient was started on IV fluids and antibiotics. He was given an enema, followed by laxative and manual disimpaction of stool. Colonoscopy was performed and biopsies were obtained. Tissue biopsy was significant for focal active colitis with regenerative glandular changes and neural hyperplasia.

CONCLUSION

Elevated lactic acid level secondary to ischemia of the bowel wall with CT scan findings aid in establishing the diagnosis of stercoral colitis complicated with ischemic colitis. Urgent treatment with laxatives and fecal disimpaction is indicated to prevent perforation and peritonitis.

[Linear or bubbly: a pictorial review of CT features of intestinal pneumatosis in adults]

Pneumatosis intestinalis is a rare condition, which is defined by the presence of gas within the bowel wall. In adult patients, pneumatosis intestinalis can be depicted in various circumstances. Owing to the routine use of CT to investigate patients with abdominal pain, pneumatosis intestinalis can be seen as an incidental finding or can be observed in association with a life-threatening disease such as bowel infarction. On CT images, pneumatosis intestinalis can display two different appearances; one that has a cystic or bubbly appearance can be considered as a chronic pneumatosis and is suggestive for a benign cause while the other, which has a linear appearance can be considered as a symptom and is more frequently secondary to a life-threatening cause. However, none of these two CT characteristics can be considered pathognomonic for any of these two categories of causes. In such situations, the analysis of the location, extent and, if any, associated findings may help to differentiate between benign and life-threatening causes. In these patients who present with abdominal signs that mimic symptoms that would warrant surgical exploration, the analysis of associated findings is critical to rule out a life-threatening cause of pneumatosis intestinalis and to obviate the need for unnecessary laparotomy. In adult patients with a known specific disease such as celiac disease, chronic pseudointestinal obstruction or other chronic diseases, even with accompanying pneumoperitoneum, pneumatosis intestinalis does not uniformly mandate surgical exploration. This pictorial review presents the more and the less common pneumatosis intestinalis CT features in adult patients, with the aim of making the reader more familiar with this potentially misleading sign.