Avascular necrosis (AVN), also called osteonecrosis, is a condition characterized by the loss of blood supply to a particular area of bone. This can result in the death of bone tissue and, in severe cases, the collapse of a segment of bone. If the affected area involves the surface of a joint, it can lead to the rapid progression of osteoarthritis.
AVN typically affects the hip and knee more frequently than other body parts. It's crucial to diagnose and initiate treatment promptly when AVN affects the hip to prevent disability. The course of treatment may differ significantly based on the extent and location of the condition, but the primary objective of early treatment is to prevent joint surface collapse. In advanced stages of AVN resulting in painful arthritis, a hip replacement may be necessary.
Avascular necrosis can happen when the blood supply to a bone is interrupted, usually due to an injury or trauma. For example, AVN of the hip can occur after a fracture of the femur (thighbone). It can also be caused by systemic steroid use or certain inflammatory diseases like lupus, although the exact reason why this happens is not well understood.
Avascular necrosis (AVN) can be asymptomatic in its early stages, but as the condition progresses, the following symptoms may occur:
It's important to note that the symptoms of AVN can vary depending on the location and extent of the affected bone. Therefore, it's essential to consult your Orthopaedic doctor if you experience any of these symptoms. it is very important to diagnose and treat early in order to prevent disability.
There are several methods for diagnosing avascular necrosis (AVN), which may include:
