Lesch–Nyhan syndrome
/lɛʃˈnʌɪhən
/noun [mass noun]
A rare hereditary disease which affects young boys, usually causing early death. It is marked by compulsive self-mutilation of the head and hands, together with learning difficulties and involuntary muscular movements.
Origin
1960s: named after Michael Lesch (born 1939) and William L. Nyhan (born 1926), American physicians.