Solitary juvenile polyp as a cause of elevated faecal calprotectin in an adult

Faecal calprotectin (FCP) levels are commonly measured in both primary and secondary care as an adjunct to the diagnosis of inflammatory bowel disease (IBD). Juvenile polyps are a rare form of colonic polyp found in both adults and children. We present a case of an adult patient who presented with a very high FCP level, which subsequently normalised following removal of a solitary colonic juvenile polyp. There was no evidence of IBD. Elevation of FCP levels due to this type of colonic pathology have not previously been described in the literature.

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