title: 'Butterfly' sign.
authors: Service de Dermatologie, Chu Morvan, Brest, France.
authors: P
authors: P
authors: Plantin
authors: P
authors: P
authors: Delaire
authors: B
authors: B
authors: Sassolas
authors: G
authors: G
authors: Guillet
mesh_terms: D006801:Humans; D010859:Pigmentation Disorders / Q000473:pathology*; D011537:Pruritus / Q000473:pathology*