Epiphysis refers to the ends of long bones that are adjacent to the joints. Therefore, this disorder is one that involves more than one epiphysis. MED occurs in approximately 9 in 100,000 live births (4). Initially, two types of MED were identified: Fairbank Type (severe) and Ribbing Type (mild). However, the MED is now considered one clinically heterogenous disorder, and the two classifications have been abandoned (5).