Bilateral Osteochondritis Dissecans of the Capitellum in Fraternal Twins: A Case Report.

CASE: We report the cases of 15-year-old male fraternal twins with bilateral osteochondritis dissecans (OCD) of the capitellum in the absence of syndromic features. At the time of presentation, they had been actively engaged in competitive rhythmic gymnastics for 3 years. Both patients had chronic symptoms in the right elbow, and both underwent arthroscopic evaluation and management. CONCLUSION: The cases of these 2 patients provide evidence to support the theory that the etiology of OCD may have a genetic background.