This 45 year old man presented with pain in the left hip and limping gait. He gave a history of fall from motorbike 2 years ago.
What is your diagnosis?
This is a case of avascular necrosis. Most likely the left hip was dislocated when he fell from the bike 2 years ago. The femoral head is supplied with blood from the medial circumflex femoral and lateral circumflex femoral arteries, which are branches of the profunda femoris artery. There is also a small contribution from a small artery in the ligamentum teres to the top of the femoral head which is a branch of the posterior division of the obturator artery. Most likely these vessels were ruptured when the dislocation occurred.