Primary colonic glomus tumours are exceptionally rare and little is known about their natural history. Glomus tumours are mesenchymal tumours of pericytic origin, derived from the glomus body. They occur most commonly as benign subcutaneous lesions of peripheral soft tissue; however, they can infrequently arise at visceral sites including the stomach, pancreas, liver, lung, intestines and genitourinary tract.

We report the case of a previously well 37-year-old man who presented with a 3-year history of intermittent abdominal pain and altered bowel habit. At colonoscopy a “cobblestoned” area in the ascending colon was encountered; biopsy showed a tumour of uncertain pathology but with no clear evidence of malignancy. A CT scan revealed …