Have Cat Questions? Ask a Cat Vet Online.
Here is some information I found:
Coxofemoral (hip dislocation) luxation is dislocation of the head of the femur, which is the ball of the thigh bone, out of the socket of the pelvis (acetabulum). Hip dislocations can develop under a number of circumstances. Prominent reasons are trauma and pre-existing hip problems such as hip dysplasia. Hip dislocation occurs when the round ligament of the femoral head, the structure that normally tethers the femoral head within the acetabulum, completely ruptures or pulls away from its attachment.There are no breed, age, or sex susceptibilities for this problem.The potential long-term effects of hip luxation range from none, if the problem is addressed early, to severe arthritis in the joint if there is excessive delay in treatment.
Hope this helps!