Avascular necrosis and other non‑arthritic hip conditions explained

Avascular necrosis (AVN) is a serious condition in which blood flow to the hip bone is reduced or stopped, causing bone tissue death, weakening of the femoral head and, if untreated, collapse of the joint that may require hip replacement. Dr Pankaj Walecha of Sarvodaya Hospital in Faridabad emphasizes that early diagnosis is essential to preserve mobility.

A review from Yale identifies three additional non‑arthritic causes of persistent hip pain: osteonecrosis of the femoral head, femoral‑neck stress fractures and subchondral insufficiency fractures. All present with similar symptoms and may appear normal on early X‑rays. Orthopedic surgeon Dr Daniel Wiznia notes that osteonecrosis is linked to long‑term steroid use, heavy alcohol consumption and metabolic or vascular issues, while stress fractures arise from repetitive strain in athletes or military personnel, and insufficiency fractures occur in bones weakened by osteoporosis or vitamin‑D deficiency. Early detection of any of these pathologies is crucial to prevent irreversible joint damage and the need for joint replacement surgery.