How AVN Is Diagnosed: MRI, X-Ray and Clinical Examination

Avascular Necrosis (AVN) is a race against time. The earlier it is found, the more of your natural hip can be saved. Yet AVN is often missed for months, because the standard X-ray looks normal in the early stages. Here is how proper diagnosis works, and what you should do.

Why early diagnosis changes everything

Treatment options shrink with every passing grade. At Grade 1–2, regenerative options like SVF therapy can help the bone heal. By Grade 4, hip replacement is usually the only reliable answer. The test you choose, and how soon you take it, directly decides which side of that line you land on.

MRI scan: the gold standard

MRI (Magnetic Resonance Imaging) uses magnets, not radiation, to photograph the inside of your bones. It is the most sensitive test for AVN and can detect the disease months or even years before an X-ray shows anything.

An MRI report for AVN typically describes:

• The extent of bone death, how much of the femoral head is affected
• Bone marrow edema, swelling inside the bone
• Fluid changes and early fracture lines invisible to X-rays
• Whether the other hip is silently affected too

X-ray imaging: useful, but late

X-rays are cheap, quick, and available everywhere in India. They show:

• The shape and structure of the femoral head
• Bone collapse or flattening (the "crescent sign")
• Joint space narrowing from arthritis
• Overall hip alignment

The catch: these changes appear only from Grade 2 onwards. A normal X-ray does not rule out AVN. If your X-ray is "fine" but the pain continues and you have risk factors, insist on an MRI.

Clinical examination

Before and alongside imaging, a specialist examines you in person:

• Range of motion testing: rotating and moving the hip to find restricted, painful directions
• Pain assessment: where it hurts, when, and how much
• Gait evaluation: watching how you walk, checking for a limp
• Medical history: steroid use, alcohol, injuries, other illnesses
• Risk factor identification: to protect the other hip and guide treatment

See the full picture of what AVN feels like on our symptoms page.

What to bring to your consultation

• Your MRI films or CD and the written report
• Any X-rays taken so far
• A list of medicines you take now or took in the past (especially steroids)
• Reports of related conditions, sickle cell, lupus, transplant, COVID hospitalisation
• A note of when the pain started and how it has changed

How we review your MRI: free, in 3 simple steps

1. Send your details using the form below, or call +91 82230 82900.
2. Share your MRI report when we call you back.
3. Get a clear answer: your AVN grade, what it means, and which treatments genuinely fit your stage, explained in simple language, with no obligation.

Then read the complete AVN treatment guide to understand your options in depth.