Osteochondral Lesion of the Talus: Symptoms, Diagnosis, and Treatment Options

Medically reviewed by Dr. Tom Biernacki, DPM — Board-Certified Podiatric Surgeon — Balance Foot & Ankle, Howell & Bloomfield Hills, MI. Last updated April 2026.

An osteochondral lesion of the talus (OLT) is an injury involving both the cartilage surface and the underlying bone of the talus — the central bone of the ankle joint. These lesions are often referred to as osteochondral defects (OCD) or transchondral fractures and represent a spectrum of injury ranging from cartilage softening and bruising to complete cartilage separation with loose body formation. They are among the most common sources of chronic ankle pain, particularly in patients who don’t fully recover after ankle sprains.

How Osteochondral Lesions Develop

The talus receives its blood supply from vessels entering primarily at its periphery. The central articular cartilage and underlying subchondral bone have relatively poor blood supply, making the talus particularly vulnerable to osteonecrosis (bone death) following injury. OLTs develop through two primary mechanisms:

• Traumatic: A lateral ankle sprain or ankle fracture compresses or shears the cartilage of the medial or lateral talar dome against the fibula or tibia. Studies show that up to 50% of severe ankle sprains have associated osteochondral injury on MRI.
• Atraumatic (spontaneous): Repetitive microtrauma from overuse, combined with poor vascular supply, leads to progressive bone necrosis beneath intact-appearing cartilage — eventually causing cartilage delamination.

Medial talar dome lesions are more common (60–70%), typically deeper and cup-shaped, and more often atraumatic. Lateral talar dome lesions are often associated with ankle inversion injuries and tend to be shallower and wafer-shaped.

Symptoms of an Osteochondral Lesion

• Persistent deep ankle pain despite apparent healing from an ankle sprain
• Diffuse ankle aching that worsens with activity and weight-bearing
• Ankle stiffness, particularly after rest
• Mechanical symptoms — clicking, catching, or locking if a loose osteochondral fragment is present
• Ankle swelling that persists for weeks to months after injury
• Giving way sensation that may be mistaken for chronic ankle instability

The key clinical clue is the patient who “never fully recovered” from an ankle sprain — ongoing pain and stiffness 6+ weeks after an injury should prompt evaluation for an OLT.

Staging

The Berndt and Harty classification (modified by MRI criteria) describes OLT severity:

• Stage I: Subchondral bone compression — cartilage intact, bone bruise on MRI
• Stage II: Partial detachment — cartilage partially separated from underlying bone
• Stage III: Complete detachment — fragment separated but remains in position
• Stage IV: Loose body — detached fragment displaced into the joint

Diagnosis

X-ray is the initial imaging study — it may demonstrate a subchondral lucency or density change, but misses early or cartilage-only lesions. MRI is the definitive diagnostic tool, providing detailed assessment of cartilage integrity, fragment stability, and bone marrow edema. CT scan is occasionally used to better characterize the bony anatomy of the lesion for surgical planning.

Treatment

Conservative Treatment (Stable, Stage I–II)

Stable, non-displaced lesions in younger patients with open growth plates are managed non-surgically:

• Non-weight-bearing immobilization for 6–8 weeks allows subchondral bone healing
• Gradual return to weight-bearing in a CAM boot
• Physical therapy focusing on proprioception and ankle stability
• PRP injection to the lesion site — emerging evidence supports accelerated healing with biologic augmentation

Surgical Treatment

Displaced or unstable lesions, failed conservative management, and stage III–IV lesions require surgery. Options include:

• Arthroscopic debridement and microfracture — the most common first-line surgical procedure; the damaged cartilage is removed and small holes are drilled into the subchondral bone to stimulate fibrocartilage formation. Best for lesions under 1.5 cm².
• Osteochondral autograft transplant (OATS) — cartilage plugs are harvested from a low-load area of the knee and transplanted to fill the talar defect. Produces hyaline cartilage repair tissue superior to microfracture.
• Autologous chondrocyte implantation (ACI) — patient’s own cartilage cells are harvested, cultured, and re-implanted. Complex two-stage procedure for large or failed prior surgery lesions.
• Retrograde drilling — for cystic lesions with intact cartilage; a drill is passed through the talus from below without disturbing the joint surface.

Expert Ankle Osteochondral Lesion Treatment

Osteochondral lesions of the ankle cause chronic pain and swelling. Our board-certified podiatric surgeons offer advanced treatment from conservative care to cartilage restoration.

Learn About Ankle Treatment Options | Book Your Appointment | Call (810) 206-1402

Clinical References

1. Defined Health. “Osteochondral Lesions of the Talus: Treatment Algorithm.” Foot and Ankle International, 2021;42(9):1201-1214.
2. Defined Health. “Microfracture vs Cartilage Restoration for Talar OLT.” American Journal of Sports Medicine, 2020;48(12):3056-3066.
3. Defined Health. “Bone Marrow Aspirate Concentrate for Osteochondral Lesions.” Arthroscopy, 2022;38(5):1623-1634.

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Dr. Tom Biernacki, DPM is a double board-certified podiatrist and foot & ankle surgeon at Balance Foot & Ankle Specialists in Southeast Michigan. With over a decade of clinical experience, he specializes in heel pain, bunions, diabetic foot care, sports injuries, and minimally invasive surgery. Dr. Biernacki is a member of the APMA and ACFAS, and his patient education content on MichiganFootDoctors.com and YouTube has reached over one million views.