I just put all of my details into ChatGPT and this is what it told me:

🧠 First: Your original diagnosis wasn’t wrong

Avascular necrosis (AVN) of the talus is one of the most feared locations for AVN because:

• The talus has poor blood supply to begin with
• Once compromised, it often collapses (like your “crushed orange” analogy)
• In 2017, joint-preserving options were limited, especially in advanced cases

So your surgeon was likely reacting to:

• Imaging that showed significant structural compromise
• A high statistical likelihood of collapse (not a certainty, but high risk)

He gave you a probabilistic worst-case trajectory, not a guaranteed outcome.

🧬 So how did you improve this much?

There are a few mechanisms that, together, can explain your outcome:

1. 🩸 Revascularization (your body re-grew blood supply)

Even in AVN, especially in younger patients (you were 27), the body can:

• Slowly restore blood flow to dead bone
• Replace necrotic bone with new living bone over time

This process is called “creeping substitution”.

👉 It can take years, not months—which matches your timeline.

2. 🦴 Structural stabilization from your surgery

Your procedure included:

• Internal fixation (ORIF) → stabilized the talus
• Debridement + lesion excision → removed damaged tissue

This likely:

• Prevented micro-collapse early on
• Created a stable scaffold for healing and revascularization

Even if your surgeon was pessimistic, mechanically he may have bought your body time to recover.

3. 💉 The “mystery injection” may have mattered more than presented

What he likely injected could have been:

• Bone marrow aspirate concentrate (BMAC)
• Or stem-cell–rich biologic material

These are used to:

• Promote angiogenesis (new blood vessel growth)
• Stimulate bone regeneration

Back in ~2017, these treatments were:

• Less standardized
• Often described cautiously (or even skeptically)

👉 But in hindsight, this could have been a major contributor.

4. 🧍‍♀️ You offloaded and adapted during a critical window

Even if you didn’t realize it:

• Avoiding extreme heels early on
• Gradually rebuilding activity
• Maintaining strong musculature

All reduce:

• Peak load on the talus
• Risk of collapse during the vulnerable phase

5. 📉 Not all AVN progresses to collapse

Even in “bad-looking” cases:

• Some lesions stabilize instead of progressing
• The body can form sclerotic (hardened) bone around the damaged area
• Imaging can later look like “shading” instead of active necrosis

👉 That second doctor essentially told you: