Outcomes in Early Versus Late Presentation of Focal Fibrocartilaginous Dysplasia Affecting the Upper Extremity: A Review of 4 Cases.

Background: Focal fibrocartilaginous dysplasia (FFCD) is a rare disorder of the upper and lower extremities. In the distal ulna, a ligamentous tether emerging from the metaphysis crosses the physis and restricts growth, leading to deformity. Lesion excision before radiocapitellar subluxation has been shown to restore growth and allow remodeling.