[Unusual association between auto-immune hepatitis and pyoderma gangrenosum. A case report].

Abstract Pyoderma gangrenosum is an uncommon neutrophilic dermatosis that presents as an inflammatory and ulcerative disorder of the skin. This entity is associated with systemic diseases and autoimmune diseases but exceptionally with autoimmune hepatitis. We report the case of a 40 year-old woman diagnosed with type 1 autoimmune hepatitis 12 years earlier and admitted for the appearance of an ulcerative lesion in the left leg. Histology confirmed pyoderma gangrenosum.