Osteochondritis dissecans (OCD) of the shoulder is a focal disruption of the subchondral bone and overlying cartilage that affects skeletally immature throwing athletes. It is less common than elbow OCD but follows similar principles of evaluation and treatment, with outcomes driven by early recognition and lesion stability. Delayed recognition can convert a healable lesion into a displaced fragment requiring more invasive treatment.
What Is Shoulder OCD?
OCD is a condition in which a segment of subchondral bone loses its blood supply, softens, and can separate from the surrounding bone. The overlying cartilage, nourished by joint fluid, may remain intact or may detach with the bone fragment. In the shoulder, OCD most often affects the humeral head on the posterior-superior surface, where the rotator cuff undersurface contacts the bone during overhead throwing.
OCD lesions are staged by stability:
- Stable: intact cartilage, no fragment separation, often heal with rest
- Unstable: partial separation with cartilage intact but fragment loosening
- Displaced: fragment fully separated, becoming a loose body in the joint
Stage at presentation determines treatment. Early recognition and protection of stable lesions in young athletes allow healing. Delayed diagnosis can convert a stable lesion into a displaced fragment requiring more invasive treatment.
Causes and Risk Factors
- Repetitive throwing in skeletally immature athletes, more common in pitchers and quarterbacks
- Age 10 to 16, with active growth plates
- High pitch counts or overuse without adequate rest periods
- Direct trauma in some cases, though repetitive loading is the dominant mechanism
- Possible genetic predisposition
Symptoms
- Gradual onset of shoulder pain with throwing, initially low-grade and activity-related
- Loss of velocity or command in throwers
- Pain that progresses to include activities of daily living in later stages
- Catching, locking, or swelling if a fragment becomes loose
- Pain disproportionate to examination findings in early stable lesions
Diagnosis
Dr. Chudik’s evaluation includes the sport and throwing history, symptom duration, and examination focused on range of motion and impingement signs. X-rays can show the lesion in established cases but may be normal in early disease. MRI is the imaging study of choice and characterizes the size, depth, stability, and status of the overlying cartilage. The Westmont office has on-site high-field MRI.
Treatment
Non-surgical treatment is the first line for stable lesions in skeletally immature patients. It involves:
- Rest from throwing for three to six months
- A targeted physical therapy program for shoulder mechanics and scapular control
- Serial imaging to monitor healing
- Gradual return to throwing with mechanics review
Surgical treatment is indicated for unstable or displaced lesions and for lesions that fail to heal after an appropriate non-surgical trial. Dr. Chudik performs arthroscopic procedures including:
- Debridement and microfracture of small unstable lesions
- Fixation of larger in-situ unstable fragments with bioabsorbable implants
- Osteochondral autograft or allograft transfer for displaced lesions with cartilage loss
- Removal of loose bodies from the joint
Recovery and Outcomes
Recovery with non-surgical treatment takes three to six months, with gradual reintroduction of throwing after imaging confirms healing. Recovery after fixation or grafting involves progressive motion and protected loading, with return to throwing typically six to nine months.
Outcomes in stable lesions treated early are good. Displaced lesions with established cartilage damage have less predictable outcomes, which is why early recognition matters in young throwers.
When to See Dr. Chudik
Schedule an evaluation if a young thrower has shoulder pain that has persisted beyond a few throwing sessions, or if velocity or mechanics have deteriorated without clear injury. Call 630-324-0402 or request an appointment online.