Osteochondritis dissecans (OCD) of the capitellum is a problem with the bone and cartilage on the outer, rounded end of the upper arm bone at the elbow (the capitellum). Repetitive stress, typically from throwing or weight-bearing on the arms, disrupts the blood supply to a small area of bone under the cartilage. The area can soften and, if it progresses, a piece of bone and cartilage can loosen. It mainly affects young athletes aged about 10 to 16, especially baseball pitchers and gymnasts.1,2
- Gradual pain on the outer side of the elbow in a young thrower or gymnast
- Stiffness, especially loss of the last few degrees of straightening the elbow
- Catching or locking if a loose fragment forms
- Stable lesions often heal with rest from throwing and weight-bearing on the arms
- Unstable lesions usually need arthroscopic surgery; most athletes return to sport
Symptoms
- Aching on the outer (lateral) elbow during and after throwing, tumbling or handstands
- Loss of full elbow straightening
- Swelling
- Catching, clicking or locking when a loose piece has formed
Capitellar OCD is different from UCL (Tommy John) injuries, which cause pain on the inner side of the elbow, and from Panner disease, a self-limiting condition of the whole capitellum in younger children.
Diagnosis
X-rays may show flattening or a lucent (dark) area in the capitellum, but early lesions can be missed, so MRI is used to assess size, location and stability. Factors that point to a stable lesion include an open growth plate, localized changes on X-ray and good elbow motion. Signs of an unstable lesion include a closed growth plate, a fragmented piece, or loss of 20 degrees or more of elbow motion.2 Lesions on the outer edge of the capitellum tend to behave worse.3
Non-surgical treatment
Stable lesions are treated with rest from throwing, tumbling and weight-bearing on the arms, typically for several months, followed by a supervised return to sport once the elbow is pain-free with full motion and imaging shows healing. In one classic series, stable lesions with an open growth plate and good motion healed completely with elbow rest.2
Surgery
Surgery is recommended for unstable lesions, loose fragments, or stable lesions that do not heal with rest. Options, usually done arthroscopically, include:
- Removing loose pieces and smoothing the area (debridement), sometimes with microfracture to stimulate repair tissue
- Fixing a large fragment back in place
- Replacing the damaged area with a plug of bone and cartilage (osteochondral autograft transplantation), often for larger or outer-edge lesions
For large unstable lesions, fixation or reconstruction gave better results than simply removing the fragment.2 See cartilage repair and transplantation.
Return to sport
A 2026 review of youth baseball players found that 92% returned to sport after surgery, with the highest rates after osteochondral autograft transplantation, but almost half of pitchers were unable to return to pitching.1 Across studies, about 81% returned to sport after surgery, most often around 6 months (range 3 to 12 months), once motion had returned and imaging showed healing.4
Frequently asked questions
Will my child be able to throw again?
Most young athletes return to sport, but pitchers have a lower rate of returning to pitching. Early diagnosis, when a lesion is still stable, gives the greatest chance of healing without surgery.
How long does rest take?
Stable lesions are usually rested from throwing and arm weight-bearing for several months, with repeat imaging to confirm healing before a gradual return.
Does my child need surgery?
Not always. Stable lesions in younger athletes with open growth plates often heal with rest. Unstable lesions or loose fragments usually need surgery.
Can it be prevented?
Following pitch-count and rest guidelines, avoiding year-round throwing, and getting persistent outer-elbow pain checked early all help.
What is the difference between OCD and Panner disease?
Panner disease affects the whole capitellum in children usually under 10 and tends to heal on its own. OCD is a localized lesion in older children and teens and can become unstable.
Research cited on this page
- Paul RW, Anton B, Casalino G, et al. Return to sport after surgical treatment of capitellar osteochondritis dissecans lesions in baseball players: a systematic review and meta-analysis. Am J Sports Med. 2026;54(11):2840-2853. PubMed
92% of youth baseball players returned to sport after surgery, with the highest rates after autologous osteochondral transplantation; almost half of pitchers could not return to pitching. - Takahara M, Mura N, Sasaki J, et al. Classification, treatment, and outcome of osteochondritis dissecans of the humeral capitellum. Surgical technique. J Bone Joint Surg Am. 2008;90 Suppl 2 Pt 1:47-62. PubMed
Stable lesions (open growth plate, localized changes, good motion) healed with elbow rest; unstable lesions did better with surgery, and fixation or reconstruction beat simple fragment removal for large lesions. - Kolmodin J, Saluan P. Osteochondritis dissecans of the humeral capitellum: the significance of lesion location. Orthop J Sports Med. 2014;2(4):2325967114530840. PubMed
Lesions on the outer (lateral) capitellum, especially involving the lateral cartilage margin, may need more aggressive surgical management. - George A, Holderread BM, Phelps BM, et al. Rehabilitation and return to sport criteria following surgical treatment of osteochondritis dissecans of the capitellum: a systematic review. JSES Int. 2024;8(2):355-360. PubMed
The return-to-sport rate after surgery was 80.9%, most often at about 6 months (range 3 to 12), with elbow motion and imaging healing as the most consistent criteria.
Medically reviewed by Andrew P. Dold, MD, FAOA, FAAOS, FACS, FRCSC. Last reviewed October 2026. This page is general information, not medical advice. Your own diagnosis and treatment plan depend on your exam and imaging.
