Duodenal polyp with mixed features – a case report

Abstract

Epithelial polyps are a common finding in the colorectum. They are less common in small bowel in absence of any polyposis syndromes. These polyps are conventionally divided into adenomatous polyps and serrated polyps, with the latter further subdivided into hyperplastic polyps, traditional serrated adenomas and sessile serrated polyps. Polyps with mixed features displaying more than one type of morphology have been described but are less common. Tubular adenomas are common in the colorectum with a lifetime prevalence of 30–50% in industrialised countries.1 Mixed adenoma-serrated polyps comprise only <1% of all colorectal polyps,1 with no duodenal variant case reports identified in the literature. We present a case of a mixed polyp in the duodenum without any known history of polyposis syndrome.