Isolated dislocation of the radial head is an uncommon injury. This in
jury has been reported in children [2-4, 6, 9, 10]; in the skeletally
mature it is extremely rare [1, 8, 11]. An irreducible dislocation has
been previously reported in a young child , but no case has to dat
e been reported in an adult. The present case is reported to demonstra
te this rare injury and to suggest a possible explanation for the caus
e of the irreducibility.