Open quiz solution: Case report 771

: Melorheostosis is a rare congenital disease, some 300 cases have been reported in the literature. The main purpose of this case report is twofold: (1) to present an unusual case of melorheostosis of the right hand, beginning in infancy, with serial radiographic studies to show the gradual progression of the disease; and (2) to present the first case with the development of "aggressive" fibromatosis (desmoid tumor) of the adjacent soft tissues, associated with melorheostosis.