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

What Is an Osteochondral Lesion of the Talus?

An osteochondral lesion of the talus (OLT) — also called an osteochondral defect (OCD) or osteochondral fracture — is a focal area of damage to both the cartilage surface and the underlying subchondral bone of the talus, the critical load-bearing bone at the top of the foot that forms the ankle joint. The talus is covered by hyaline cartilage — a smooth, low-friction surface that allows the ankle to move and transmit load without pain — but this cartilage has extremely limited healing capacity because it has no direct blood supply. When cartilage is damaged, the body cannot adequately repair it, leaving a defect that causes pain, catching, and swelling with ankle motion.

OLTs occur most commonly following acute ankle trauma (ankle sprain or fracture — the most common mechanism), though some develop from chronic repetitive loading, osteonecrosis (bone death from compromised blood supply), or in association with systemic disease. The medial (inner) aspect of the talar dome is affected slightly more often than the lateral aspect, and the two have somewhat different characteristics: medial lesions tend to be deeper, more cup-shaped, and more commonly associated with osteonecrosis, while lateral lesions are more often associated with acute trauma.

Symptoms of OLT

OLT frequently presents as “chronic ankle sprain syndrome” — persistent ankle pain, swelling, and a feeling of instability or giving way that persists for months to years after an ankle sprain, well beyond the expected recovery period. Patients often describe deep ankle pain, a catching or locking sensation during movement, and worsening symptoms with walking on uneven terrain, stairs, or impact activities. The ankle may swell after activity. A history of previous ankle sprain with “incomplete recovery” should always raise suspicion for an underlying OLT. Because ankle sprains are common and OLTs are comparatively rare, the diagnosis is frequently missed or significantly delayed.

Diagnosis

Plain X-rays may reveal an OLT as a radiolucent defect in the talar dome, but many lesions — particularly those without significant bone involvement — are invisible on plain films. MRI is the preferred imaging modality, providing detailed information about the size, depth, location, and stability of the lesion, as well as the condition of the surrounding cartilage and bone. CT scan offers superior bony detail and is often used for pre-surgical planning to define the three-dimensional geometry of the defect. Diagnostic arthroscopy provides direct visualization of the cartilage surface and allows simultaneous treatment in many cases.

Conservative Treatment

Not all OLTs require surgery. Stable, non-displaced lesions — particularly in younger patients with skeletally immature bone — may heal with conservative management. A period of immobilization (cast or walking boot) for 6–12 weeks, combined with protected weight-bearing, can allow stable lesions to heal in some patients. Following immobilization, a graduated rehabilitation program restores range of motion, strength, and proprioception. NSAIDs manage pain and inflammation. Conservative management is generally tried for 3–6 months before surgical intervention is considered for symptomatic lesions that do not require urgent surgery.

Surgical Treatment Options

Surgical treatment is recommended for OLTs that are unstable, have failed conservative management, or are of a size or location associated with poor healing potential. Ankle arthroscopy with marrow stimulation (microfracture or drilling) — penetrating the subchondral bone to stimulate fibrocartilage formation at the defect site — is the most commonly performed procedure for smaller lesions (under 1.5 cm²), with success rates of 75–85% for appropriate candidates. Osteochondral autograft transfer (OATS/mosaicplasty) — transplanting healthy cartilage-bone plugs from a non-weight-bearing area of the patient’s own joint — is used for larger or failed microfracture lesions, providing hyaline-like cartilage with good long-term durability. Autologous chondrocyte implantation (ACI) and fresh osteochondral allograft transplantation are additional options for large, complex lesions. Return to sports after OLT surgery typically requires 4–9 months depending on procedure complexity.

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Osteochondral Lesion of the Talus Treatment in Michigan

Osteochondral lesions (cartilage damage) in the ankle joint can cause chronic pain, swelling, and instability after ankle sprains. At Balance Foot & Ankle, Dr. Tom Biernacki provides advanced diagnosis and treatment for talar dome lesions — serving Howell and Bloomfield Hills, MI.

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Clinical References

1. Zengerink M, Struijs PA, Tol JL, van Dijk CN. Treatment of osteochondral lesions of the talus: a systematic review. Knee Surg Sports Traumatol Arthrosc. 2010;18(2):238-246.
2. Looze CA, Capo J, Ryan MK, et al. Evaluation and management of osteochondral lesions of the talus. Cartilage. 2017;8(1):19-30.
3. Chuckpaiwong B, Berkson EM, Theodore GH. Microfracture for osteochondral lesions of the ankle: outcome analysis and outcome predictors of 105 cases. Arthroscopy. 2008;24(1):106-112.

Dr. Tom Biernacki, DPM

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.