HardGastroenterologyDermatitis herpetiformis and coeliac diseaseau-amcau-racp
A 29-year-old woman presents with chronic diarrhoea, weight loss and a pruritic vesicular rash on the extensor surfaces of her elbows and knees. Biopsy of the rash shows granular IgA deposition in the dermal papillae. Coeliac serology is positive. Which diagnosis best explains both her gastrointestinal and skin manifestations?