Most common complication of transcerincal fracture neck of femur is
**Core Concept**
Transcervical fractures of the femur are a type of hip fracture that occurs through the neck of the femur, just below the head. The complication profile of these fractures is influenced by the displacement and stability of the fracture, as well as the patient's overall health status.
**Why the Correct Answer is Right**
The most common complication of transcervical fractures of the femur is avascular necrosis (AVN) of the femoral head. This occurs due to the disruption of the blood supply to the femoral head, which is primarily provided by the medial and lateral circumflex femoral arteries. The fracture can cause damage to these arteries, leading to a loss of blood flow and subsequent AVN.
**Why Each Wrong Option is Incorrect**
* **Option A:** Nonunion is a possible complication of femoral neck fractures, but it is not the most common complication. Nonunion typically occurs in fractures that are significantly displaced or comminuted.
* **Option B:** Infection is a potential complication of any surgical procedure, including the treatment of femoral neck fractures. However, it is not the most common complication of transcervical fractures.
* **Option C:** Malunion is a possible complication of femoral neck fractures, but it is not the most common complication. Malunion typically occurs in fractures that are not adequately reduced or stabilized during the healing process.
**Clinical Pearl / High-Yield Fact**
Femoral neck fractures are more common in older adults, particularly in those with osteoporosis, and are often associated with a higher risk of complications, including AVN and nonunion.
**Correct Answer:** D. Avascular Necrosis