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Talar Dome Osteochondral Lesion (OLT)

Cartilage and subchondral bone defect on the talar dome from acute trauma or chronic instability, presenting with persistent ankle pain after sprain, requiring tailored arthroscopic or open surgical management.

Written by: Saygı Hospital Health Guide Editorial Board
Last updated:

This content has been compiled by the Saygı Hospital Health Guide Editorial Board and is periodically reviewed by a specialist physician.

References (5)

This content is for informational purposes only and does not constitute medical advice. You can book an appointment at our Ortopedi ve Travmatoloji department. Book Appointment →

What is Talar Dome Osteochondral Lesion (OLT)?

OLT pathogenesis: Lateral OLT — typically anterolateral, shallower, often traumatic (inversion-dorsiflexion injury during ankle sprain); medial OLT — typically posteromedial, deeper, often atraumatic or with chronic ankle instability (cyst-like). Subchondral bone disruption with cartilage damage and possible cyst formation.

Classification systems: Berndt-Harty (Stage I — subchondral compression; II — partially detached osteochondral fragment; III — completely detached but in situ; IV — displaced fragment); Hepple MRI (Stage I-V based on cartilage and bone integrity, fluid signal, cyst formation).

Diagnosis: weight-bearing AP, lateral, mortise X-rays may show defect, but MRI is gold standard for cartilage and bone marrow assessment, edema, cyst formation, and chronicity. CT useful for surgical planning (cyst extent, bony detail). Diagnostic arthroscopy may be performed if imaging inconclusive.

Symptoms

Persistent deep ankle pain after sprain or trauma (>6 months chronic)
Swelling, especially after activity
Mechanical symptoms (catching, locking, giving way)
Pain on weight-bearing or during specific activities
Joint effusion
Stiffness after rest
Reduced range of motion (especially dorsiflexion)
Anterolateral or posteromedial joint line tenderness

Risk Factors

Acute ankle sprain (most common cause)
Ankle fracture (especially talus, malleolus)
Chronic lateral ankle instability
Repeated microtrauma (sports — soccer, basketball, gymnastics)
Younger active patients (peak 20-40)
Anatomical: medial > lateral location overall
Genetic predisposition (some pediatric idiopathic cases)
Steroid use, vascular insufficiency (risk factors for atraumatic OLT)

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

  • Persistent ankle pain >6 weeks after sprain
  • Mechanical symptoms (catching, locking) after ankle injury
  • Recurrent ankle instability with pain
  • Failed conservative management for chronic ankle pain
  • Orthopedic and foot/ankle specialist evaluation

Treatment Methods

01
Conservative management (Stage I-II, small lesions <1 cm²): immobilization (cast or boot) for 6-12 weeks with non-weight-bearing for 4-6 weeks, then progressive weight-bearing; NSAIDs; physiotherapy with proprioception training; activity modification
02
Indications for surgery: failed conservative management for 3-6 months, displaced fragments (Stage III-IV), large lesions (>1.5 cm²), persistent mechanical symptoms, athlete's needs
03
Arthroscopic debridement and drilling/microfracture: gold standard first-line surgical option for small-to-moderate lesions (<1.5 cm²); arthroscopic ankle approach (anteromedial and anterolateral portals; posteromedial/posterolateral for posterior lesions), removal of unstable cartilage flap, microfracture (3 mm awl, 3-4 mm spacing) or drilling of subchondral bone to stimulate fibrocartilage formation; ~70-85% good outcomes
04
Open or arthroscopic fixation of fragment: for Stage III lesions with viable detached fragment; bioabsorbable pins, screws, or sutures; success depends on fragment quality, vascularity, and patient factors
05
Autologous osteochondral transplantation (OATS, mosaicplasty): for failed microfracture, larger lesions (1.5-3 cm²), deep lesions; harvested from non-weight-bearing knee femoral condyle, transplanted to talus; concerns of donor site morbidity, contour mismatch
06
Autologous chondrocyte implantation (ACI/MACI): for medium-large lesions (>2 cm²) with cyst formation; first-stage harvest from knee, second-stage implantation; bone grafting for cysts; results comparable to OATS in selected lesions
07
Fresh osteochondral allograft (OCA): for large (>3 cm²) lesions, failed previous procedures; size-matched fresh allograft talus; logistically challenging (allograft availability), cost
08
Adjuncts: bone marrow aspirate concentrate (BMAC) augmentation, platelet-rich plasma (PRP), scaffolds (collagen, hyaluronan), particulated juvenile cartilage allograft
09
Postoperative rehabilitation: non-weight-bearing 4-6 weeks (variable by procedure), progressive ROM and weight-bearing, physiotherapy 3-6 months, return to sports 6-12 months
10
Posterior OLT: posterior arthroscopic approach (Van Dijk technique) avoiding malleolar osteotomy; allows treatment of posteromedial lesions
11
Lateral instability addressed: if chronic ankle instability contributing, perform Brostrom-Gould or modified Brostrom procedure simultaneously to prevent recurrent OLT
12
Outcomes: 70-85% good-to-excellent with arthroscopic microfracture; OATS 80-90% in selected cases; MACI 75-85%; long-term (>5-10 years) outcomes show some deterioration over time, particularly in younger active patients
13
Salvage procedures: ankle arthrodesis or total ankle arthroplasty for end-stage post-traumatic arthritis; rare in OLT alone

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.