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Collagenous sprue is a rare small bowel enteropathy that has overlapping clinical features with coeliac disease; it is commonly associated with arthritic autoimmune conditions, which often require non-steroidal anti-inflammatory drugs (NSAIDs). In the limited published literature available, there are putative suggestions of a link between NSAID use and collagen deposition in intestinal subepithelia in such patients. The authors present a case of a 43-year-old woman with long-standing NSAID use for autoimmune polyarthropathy and positive coeliac antibodies. However, distal duodenal biopsies revealed a thickened band of subepithelial collagen with villous atrophic appearances consistent with collagenous sprue. The patient was treated with a gluten-free diet and her NSAIDs were discontinued. After 6 months, her gastrointestinal symptoms had resolved with complete histological resolution of the collagenous subepithelial bands and villous atrophy on duodenal biopsy.

bmj case reports

Clinical and histological resolution of collagenous sprue following gluten-free diet and discontinuation of non-steroidal anti-inflammatory drugs (NSAIDs)