Deep ankle pain that does not fully settle after a sprain, combined with occasional catching, swelling, and a sense of instability, may indicate an osteochondral lesion of the talus. It is an injury that frequently co-exists with ankle instability and requires specialist evaluation to prevent progressive joint damage.
What is Talar OCD?
An osteochondral lesion of the talus (OLT), or talar OCD, is a defect in the cartilage and underlying bone of the talar dome, the weight-bearing surface of the ankle. These lesions can be acute, resulting from a high-energy ankle sprain or impact, or chronic, developing gradually from repetitive stress. The medial and lateral aspects of the talar dome are the most commonly affected areas.
Types of Talar OCD
Causes
Acute ankle trauma, particularly a significant inversion sprain or a fall from height, is the most common cause of talar OCD in younger patients. Chronic repetitive microtrauma from sport and activity, particularly in patients with underlying ankle instability who sustain repeated minor sprains, can lead to progressive osteochondral damage without a single identifiable causative event. A significant proportion of patients with chronic ankle instability are found to have co-existing talar OCD on MRI.
- Deep ankle pain that does not fully resolve after an ankle sprain, persisting weeks or months beyond the expected healing period
- Pain localised to the medial or lateral aspect of the ankle joint, worsening with weight-bearing activity and impact sports
- Swelling of the ankle joint that recurs with activity and persists longer than would be expected from a simple soft tissue sprain
- A catching, locking, or clicking sensation within the ankle joint, particularly in Stage III and IV lesions
- Stiffness of the ankle after rest or in the morning, improving with gentle movement
- A sense of giving way or reduced confidence in the ankle during sport
Diagnosis
Plain X-rays of the ankle in weight-bearing anteroposterior, lateral, and mortise views are the first investigation. Early-stage lesions and purely cartilaginous defects are frequently invisible on plain radiographs, making X-rays insufficient as the sole diagnostic tool when OCD is suspected clinically.
MRI is the gold standard investigation, providing detailed assessment of the cartilage integrity, subchondral bone signal, fragment size and stability, and the presence of any associated ligamentous injury. CT scan is useful for preoperative planning, quantifying the exact dimensions of the lesion and assessing the presence of subchondral cysts. Diagnostic ankle arthroscopy provides the most accurate assessment of cartilage quality and lesion stability when imaging findings are inconclusive.
Treatment
Ankle Arthroscopy with OCD Treatment
Dr. Kushalappa manages talar OCD lesions arthroscopically. Stable, smaller lesions are treated with debridement and microfracture, stimulating a fibrocartilage healing response from the underlying bone. Larger or unstable lesions may require cartilage transplantation techniques. When talar OCD is associated with ankle instability, both are addressed in the same procedure.
Why Choose Dr. Kushalappa Subbiah in Bangalore?
Dr. Kushalappa Subbiah completed a Fellowship in Shoulder Surgery at the Sydney Shoulder Research Institute, where he trained in advanced arthroscopic shoulder procedures including labral repair and reconstruction. He holds the International Olympic Committee (IOC) Diploma in Sports Medicine, and has direct clinical experience managing shoulder injuries in Indian athletes across cricket, swimming, tennis, and contact sports. He is appointed as a Consultant Shoulder Surgeon at NH Hospital, Bangalore.