Hypertrichosis lanuginosa

Hypertrichosis lanuginosa, also called Ambras Syndrome, "congenital hypertrichosis lanuginosa", and "congenital hypertrichosis universalis", is a genetic condition characterized by hair all over the body. This condition affects less than 1 person in a billion. Fewer than 40 cases of CHL and Ambras Syndrome have been documented worldwide. There is no known treatment other than depilation. The genetic anomaly is found on chromosome 8, though an X-linked syndrome of hypertrichosis associated with gingival hyperplasia has been described.

In the 19th century many people with hypertrichosis performed in sideshow acts.