Jean Baptiste Emile Vidal (18 June 1825 - 16 June 1893) was a French dermatologist who was a native of Paris. He studied medicine in Tours and Paris, becoming médecin des hôpitaux in 1862. For much of his career he was associated with the Hôpital Saint-Louis (1867-90) in Paris. In 1883 he became a member of the Académie de Médecine.
He is remembered for his investigations of lupus and skin lichenification. His name is associated with "pityriasis circinata et marginata of Vidal", a localized variant of pityriasis rosea,[1] and "Vidal's disease", which is synonymous with lichen simplex chronicus.[2]