Benign ulcer of the right colon clinically misdiagnosed as carcinoma: an additional case.

Benign solitary ulcer of the colon is an uncommon lesion that was originally described by Cruveilhier in 1832. Its aetiology remains unknown, and there are no pathognomonic lesions or symptoms. Diagnosis is made by exclusion; in fact, diseases such as specific infections (cytomegalovirus, campylobacter jejuni, entamoeba histolytica), common clinical conditions (acute appendicitis, diverticulitis, intestinal obstruction, inflammatory bowel disease), pharmacotherapy (non-steroidal anti-inflammatory medications, oral contraceptives, dicumarolic agents) and malignancies should be excluded. We describe the case of a 72-year-old patient admitted for acute bloody diarrhoea, originally misdiagnosed as carcinoma by colonscopy. The histological evaluation demonstrated a benign ulcerative lesion.