Cutaneous IgA vasculitis with crescentic nephropathy presenting with ulcers resembling pyoderma gangrenosum

Abstract

A biliary echography showed choledochal lithiasis. Yellow urticaria was diagnosed. The patient received intravenous antihistamines, with rapid improvement.Yellow urticaria is an unusual urticaria variant that appears in patients with hyperbilirubinaemia. It differs from the usual type because of the yellow colour of the hives. This colour seems to be due to the diffusion of bilirubin to the interstitial extravascular sector of the dermis due to the increased capillary permeability induced by urticaria. 1,2 The originality of our 2 cases show that the colour of the lesions should lead to suspect hyperbilirubinaemia. The origin of hyperbilirubinaemia can be hepatic, haemolytic or enzymatic defect. Most cases of yellow urticaria reported were associated with a liver failure with cholestasis. [1][2][3]