ameboma AmE
amoeboma BrE

The ameboma may manifest as a right lower quadrant abdominal mass, which may be mistaken for carcinoma, tuberculosis, Crohn's disease, actinomycosis, or lymphoma.

An ameboma, also known as an amebic granuloma, is a rare complication of entamoeba histolytica, where in response to the infecting amoeba there is formation of annular colonic granulation, which results in a large local lesion of the bowel.

Symptoms can include fulminating dysentery, bloody diarrhea, weight loss, fatigue, abdominal pain, and amoeboma.