Not a complication of fracture neck of femur ?
**Core Concept**
Fracture neck of femur is a serious orthopedic injury that can lead to various complications due to its proximity to vital structures and the potential for joint instability. The complications can be broadly classified into early and late complications, affecting the patient's quality of life and functional outcome.
**Why the Correct Answer is Right**
The correct answer is a complication that is not typically associated with fracture neck of femur. The most common complications include avascular necrosis (AVN) of the femoral head, nonunion or delayed union, malunion, and heterotopic ossification. AVN occurs due to disruption of the blood supply to the femoral head, which is primarily provided by the medial circumflex femoral artery. The lack of blood supply leads to ischemia and eventual necrosis of the bone tissue.
**Why Each Wrong Option is Incorrect**
**Option A:** AVN of the femoral head is a well-documented complication of fracture neck of femur, typically occurring in the first few weeks after the injury. It is often due to the disruption of the blood supply to the femoral head.
**Option B:** Nonunion or delayed union is a common complication of fracture neck of femur, especially in older patients or those with poor bone quality. It occurs when the fracture fails to heal within the expected time frame.
**Option C:** Heterotopic ossification is a rare but potential complication of fracture neck of femur, particularly in patients with a history of trauma or neurologic disorders. It involves the formation of bone tissue outside the skeleton.
**Clinical Pearl / High-Yield Fact**
It is essential to note that early mobilization and appropriate orthopedic management can significantly reduce the risk of complications following fracture neck of femur.
**Correct Answer:** D.