Dysplasia Epiphysealis Hemimelica (Trevor Syndrome) of Talus in a 21-Year Old Woman; Case Report

Dysplasia epiphysealis hemimelica is a rare nonhereditary epiphyseal disease that mimics synovial chondromatosis and osteochondroma of the joints. the disease mainly involves long bones of the lower extremities and tarsal bones. herein we report 21-year old woman who presented with pain and limited range of ankle motion, who underwent surgical excision of talus exostosis after preoperative imaging and careful planning. after that she was discharged and her problem improved and she have no problem in three year follow up .pathologic examination of specimen confirm the diagnosis.