Introduction

A 42-year-old Caucasian man presented with increased stool frequency and dyspeptic symptoms for which he had been prescribed lansoprazole. At colonoscopy he was found to have a 4-cm smooth polypoidal lesion in the transverse colon, adjacent to the hepatic flexure (figure 1). It was determined not to represent an adenoma and a CT colonogram was arranged, which found no extracolonic invasion but shed little further detail on the nature of the lesion in question.