Dislocation of the hip except as a congenital or developmental lesion
is not common, and the onset of symptoms because of posterior instabil
ity of the hip in an adult has not been reported previously. An adult
patient who had benign congenital hypotonia as an infant and who prese
nted with generalized ligamentous laxity and hip pain associated with
recurring posterior subluxation of the hip is the subject of this repo
rt.