Henri-Alexandre Danlos

Henri-Alexandre Danlos (, ; 26 March 1844 – 12 September 1912) was a French physician and dermatologist born in Paris. A group of inherited connective tissue disorders, the Ehlers–Danlos syndromes, have been named after both him and Danish dermatologist Edvard Ehlers (1863-1937).

He studied medicine in Paris, and during the early part of his career performed research in the laboratory of Charles-Adolphe Wurtz (1817-1884). In 1881, he became médecin des hôpitaux, and four years later was chef de service at the Hôpital Tenon in Paris. In 1895, he received an appointment at the Hôpital Saint-Louis.

Danlos was a pioneer in the use of radium for treatment of lupus erythematosus of the skin, and in 1901 with physicist Eugène Bloch (1878-1944), he was the first to apply radium on tuberculous skin lesions.