<prompt> Posterior dislocation of hip is characterized by DELETEMarked shoening of limbLengthening of limbNo change in limb lengthExtension deformity  <response>: In posterior dislocation, if hip there is history of trauma patient has a flexion, adduction medial rotation deformity of the affected limb.There is marked shoening gross restriction of movements of the hip Head of the femur is felt as a hard mass in the gluteal region it moves along with the femur. There could be features of sciatic nerve palsy. it is difficult to feel the femoral pulse vascular sign of Narath is negative Ref: Textbook of Ohopaedics, John Ebenezer, 5th edition, page no 214 