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Jun 23, Ramachandran BS, Thomas B, Baby S, Thomas R. Multicentric ameboma of the colon mimicking Crohn’s disease. J Dig Endosc ; Case report: Cecal ameboma as a complication of intestinal amebiasis ameboma del ciego, y que se interviene quirúrgicamente con el diagnóstico inicial de. Ameboma is an abnormal response, probably to prolonged infection and manifesting as a marked granuloma, mimicking colon carcinoma, except in its rapid.

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Ameboma: A Colon Carcinoma-Like Lesion in a Colonoscopy Finding

Int J of Gerontol. Biopsy provided a diagnosis of ameboma. It can mimic as appendicular abscess and Crohn’s disease in younger individuals and colon cancer and diverticulitis in elderly.

The appendix showed obliterative appendicitis with serositis.

National Center for Biotechnology InformationU. Follow-up colonoscopy 8 months post treatment showed complete remission. Amebic liver abscess in a patient from Pakistan.

Ameboma – Wikipedia

Indian J Pathol Microbiol ; An amebomaalso known as an amebic granulomais a rare complication of Entamoeba histolytica infection, where in response to the infecting amoeba there is formation of annular colonic granulation, which results in a large local lesion of the bowel.


Non neoplastic lesions of the colon. Please review our privacy policy. Ameboma of the colon occurs rarely due to the annular growth of granulation tissue and can present as mass lesion simulating colonic carcinoma in elderly individuals.

In our case, the patient lived in an endemic region India and his dishes were cleaned with uncooked water. Staining with PAS or immunoperoxidase and antilectin antibodies aids in the visualization of amoebae.

Error | American College of Physicians

Molecular and Biomolecular Spectroscopy. Trophozoites of Entamoeba histolytica were better recognized after periodic acid-Schiff staining. Combined with the symptom of bloody stool for about 1 month, amoebic colitis should be differentially diagnosed.

Intermittent fever was also during that week. Caecal amoeboma simulating malignant neoplasia, ileocaecal tuberculosis and Crohn’s disease. Adjacent mesocolonic fat stranding and haziness were seen with subcentimetric lymph nodes. The appearance was that of carcinoma-like lesions. N Engl J Med ; Right colonic mass with hepatic lesion – Remember ameboma? Heidenhain’s iron hematoxylin stain demonstrates erythrophagocytosis.

Colonoscopy was also done at the emergency room and showed multiple small polyps over the terminal ileum and multiple indurated ulcerations over the rectum and cecum fig.

An Atlas and Text.

Trophozoites of Entamoeba histolytica admixed in necrotic debris which were periodic acid-Schiff stain positive. Grossly, serosa was covered with exudates and showed a healed perforation. Caecal amoeboma simulating malignant neoplasia, ileocaecal tuberculosis and Crohn’s disease. A final diagnosis of ameboma was made.


Amoeboma of ascending colon with multiple amoebic liver abscesses. All these features pointed to mass-like lesion in colon, as a cause of obstruction that mimicked colon cancer.

He had also been suffering from abdominal pain over the periumbilical area, especially on the right site, for about 1 month. Amoeboma of ascending colon with multiple liver abscesses.

Ameboma of Colon Simulating Colonic Adenocarcinoma

Financial support and sponsorship Nil. Dis Colon Rectum ;9: Colonic involvement iintestinal patients with amoebic liver abscess: Entamoeba histolytica infection can lead to colitis, colonic perforation abscess, and ameboma formation. Gastroenterol Clin North Am.

Spectrochimica Acta Part A: The recovery of the patient was uneventful and the patient underwent restoration of bowel continuity after 6 weeks.