Osteochondral Lesion of the Talus (OLT) in Michigan | Causes & Treatment

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

An osteochondral lesion of the talus (OLT) — a defect in the cartilage and underlying bone of the talar dome — is a frequently delayed diagnosis that causes persistent deep ankle pain after an ankle sprain that should have healed but didn’t. OLTs result from shear or compressive forces during ankle sprain injury that damage the cartilage and subchondral bone of the talus, and they account for a significant proportion of ankle pain that continues beyond 6 weeks after the original sprain. At Balance Foot & Ankle in Southeast Michigan, Dr. Tom Biernacki evaluates persistent post-sprain ankle pain with attention to this diagnosis.

Diagnosis: Why OLTs Are Frequently Missed

OLTs are missed because standard X-rays taken immediately after an ankle sprain are insensitive for cartilage injury and small subchondral lesions — particularly the more common medial talar dome OLTs, which are partially protected from view by the medial malleolus on standard views. The patient is told they have a normal X-ray, treated for ligamentous sprain, and when symptoms persist at 6–8 weeks, may be told to “give it more time.” Key clinical clues that raise OLT suspicion: deep, diffuse aching inside the ankle joint (not at the ATFL/lateral ligaments); pain with pivoting and stair descent; intermittent swelling without re-injury; and failure to progress with standard sprain rehabilitation at the expected rate. MRI is the diagnostic standard — it identifies cartilage defect size, stability (whether the fragment is attached or detached), and subchondral edema. CT arthrography provides superior detail for surgical planning once OLT is identified on MRI.

Treatment

Conservative treatment is appropriate for: stable OLTs (fragment not detached), small lesions (<1.5 cm²), low-demand patients, and patients who have not yet tried complete rest. Conservative management includes 6–8 weeks non-weight-bearing in a cast or boot, platelet-rich plasma injection into the ankle joint, and subsequent rehabilitation. 40–55% of OLTs respond to conservative treatment. Surgical options for OLTs that fail conservative management or are large/unstable: bone marrow stimulation (microfracture/drilling) — appropriate for lesions <1.5 cm²; creates a fibrocartilaginous repair tissue. OATS (osteochondral autograft transfer) — for larger lesions; replaces the defect with a cartilage-bone plug from a non-weight-bearing area. ACI (autologous chondrocyte implantation) — for large or failed prior microfracture. Retrograde drilling — for cystic OLTs with intact overlying cartilage. Ankle arthroscopy is used for most of these procedures, with excellent visualization of the talar dome.

Frequently Asked Questions

Persistent ankle pain after a sprain needs a fresh look. Contact Balance Foot & Ankle in Southeast Michigan for osteochondral lesion evaluation with Dr. Biernacki.

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