What Are Talar Dome Lesions?
A talar dome lesion, also called an osteochondral lesion of the talus (OLT),
is an area of damaged cartilage and underlying bone on the top surface of the
talus bone in your ankle. The talus is the bone that sits between your leg bones
and heel bone, forming the main ankle joint.
These lesions typically result from ankle sprains or other traumatic injuries,
though they can sometimes develop without an obvious injury. If left untreated,
they can lead to chronic ankle pain and potentially ankle arthritis.
How They Occur
Talar dome lesions are usually caused by:
- Ankle Sprains: During a sprain, the talus can impact against the ankle bones, damaging the cartilage
- Ankle Fractures: Direct trauma can cause cartilage and bone damage
- Repetitive Stress: Chronic overloading of the ankle joint
- Reduced Blood Supply: Can lead to bone and cartilage breakdown
Importantly, up to 50% of people with significant ankle sprains may develop
some degree of cartilage damage. This is why persistent ankle pain after a
sprain should be evaluated.
Symptoms
- Deep ankle pain, especially with weight-bearing
- Persistent pain after an ankle sprain that should have healed
- Ankle swelling
- Catching, locking, or clicking in the ankle
- Feeling of instability or giving way
- Stiffness and reduced range of motion
- Pain that worsens with activity
Diagnosis
Proper diagnosis requires a thorough evaluation:
- Physical Examination: Assessing pain location, range of motion, and stability
- X-rays: May show some lesions, but many are not visible on X-ray
- MRI: The gold standard for diagnosing talar dome lesions, showing both cartilage and bone damage
- CT Scan: May be used to better assess bone involvement
Treatment Options
Non-Surgical Treatment
Smaller, stable lesions may respond to conservative treatment:
- Immobilization: Casting or walking boot to allow healing
- Activity Modification: Avoiding high-impact activities
- Physical Therapy: Strengthening and range of motion exercises
- Anti-inflammatory Medications: Pain and inflammation control
- Bracing: Ankle support during activities
Surgical Treatment
Larger lesions, unstable lesions, or those that don't respond to conservative
care may require surgery. Dr. Johnson offers several surgical approaches:
- Arthroscopic Debridement: Removing loose cartilage and smoothing damaged areas
- Microfracture: Creating small holes in the bone to stimulate healing and cartilage growth
- OATS Procedure: Transplanting healthy cartilage and bone from another area
- Cartilage Restoration: Advanced techniques to regenerate damaged cartilage
- Bone Grafting: For lesions with significant bone involvement
Recovery
Recovery depends on the treatment approach and size of the lesion:
- Non-surgical treatment: 6-8 weeks of immobilization followed by rehabilitation
- Arthroscopic surgery: 6-12 weeks before returning to normal activities
- More complex procedures: Several months of recovery and rehabilitation
Physical therapy is an important part of recovery, focusing on restoring
strength, flexibility, and proper ankle function.