Amoebic Colonic Perforation Presenting as Peritonitis in Emergency, Incidence and Outcome: Our Experience

Amoebiasisis a common parasitic infection and fulminant amoebic colitis remains a very rare complication of this disease. The objective of the present study was to find the incidence and outcome of perforation peritonitis due to amoebic colitis in MMIMSR, Mullana, Ambala, India.

200 patients with perforation peritonitis were studied retrospectively, out of which 22 cases had colonic perforation, were selected over a period of five years, between 2012 to 2017, at MMIMSR Mullana. All patients had undergone emergency laparotomy and cases with amoebic colonic perforation established on histopathology were studied in terms of incidence, clinical presentation and outcomes.

Out of 200 emergency exploratory laparotomies carried out during 2012-2017 at MMIMSR, Mullana, 22 (11%) patients had amoebic colonic perforation. The disease was more common among men as compared to women (21:1). The mean age of patients was 60±10 years. Symptom duration ranged from 1 to 8 days. 15 (68%) patients had historyof chronic alcohol intake and 2 (9%) had a recent episode of loose stools. Chest X-ray showed free gas under the diaphragm in 45% (10/22) of patients. Ultrasonography whole abdomen showing associated liver abscess was seen in 8/22 (36%) patients. Intraoperatively caecal perforation was seen in 20 cases, out of which 16 had concomitant ascending colon perforation and 2 sigmoid colon perforation. Bowel resection was performed depending upon the site and extent of the colon involved- right hemicolectomy (16), limited ileocolic resection (4) and sigmoidectomy (2). Proximal diversion stoma was made in all cases. Postoperative complications encountered were wound infection in 20 (91%) cases, followed by burst abdomen in 8 (36%) cases, stoma related complication in 6 (27%) cases. The overall mortality rate due to sepsis was 54% (12/22).

Although amoebiasis is a common parasitic infection, fulminant amoebic colitis remains a very rare complication with a reported incidence of 1%. Even with aggressive management of this entity, patients have got a poor prognosis. Resection with exteriorization of bowel is the current gold standard treatment in such cases.