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Dysplasia Epiphysealis Hemimelica of the Acetabulum. A Report of Two Cases*
DAVID L. SKAGGS, M.D.†; CHARLES N. MOON, M.D.‡; ROBERT M. KAY, M.D.†, LOS ANGELES, CALIFORNIA; HAMLET A. PETERSON, M.D.§, ROCHESTER, MINNESOTA
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Investigation perfomed at University of Southern California School of Medicine, Childrens Hospital Los Angeles, Los Angeles, and the Mayo Clinic, Rochester
J Bone Joint Surg Am, 2000 Mar 01;82(3):409-14
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Extract

Dysplasia epiphysealis hemimelica, which is also known as Trevor disease, is a rare developmental lesion that is histologically identical to an osteochondroma. The more common solitary osteochondroma and multiple hereditary osteochondromatosis typically are located on the metaphysis of long bones, occasionally on the diaphysis of long bones, and on flat bones, but never on the epiphysis. The index lesion is intra-articular and characteristically involves only half of the joint (hemimelic). The osseous portions of the lesion distinguish it from synovial chondromatosis, which always consists of multiple lesions usually dispersed throughout the joint. The osteochondroma of dysplasia epiphysealis hemimelica, in addition to being hemimelic, is initially a solitary lesion, although portions may break off, producing multiple pieces17. It is typically found in the joints of the lower extremity, with a predisposition for the medial femoral condyle, the distal aspect of the tibia, and the talus1,2,4,5,7,12,15,21,25.
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