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A 75-year-old man presented with change in bowel habits and underwent a diagnostic colonoscopy. A 50 mm lateral spreading tumour-granular polyp with a dominant nodule was found at the rectosigmoid junction. Surface biopsies indicated a tubular adenoma with low grade dysplasia. A CT found no evidence of nodal disease. As the surface and vascular pattern suggested a benign lesion, it was removed by endoscopic submucosal dissection successfully. The histopathologist was surprised to see an accumulation of lace like material expanding, occluding and …
Contributors BJR proposed idea for manuscript. DD, PM and BJR composed the manuscript. PM was involved in the clinical care of the patient. NM did the histological analysis. All authors read and approved the final draft submitted for publication.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Provenance and peer review Not commissioned; externally peer reviewed.