Presentation
Known history of hereditary multiple exostoses.
Patient Data
Multiple exostoses with medullary continuity compatible with osteochondromas are noted on the metaphyses of:
distal femora
proximal tibias
proximal fibulas
distal radii
distal right ulna
distal left tibia
proximal left humerus
left scapula
Case Discussion
Hereditary multiple exostoses (HME) or osteochondromatosis is an autosomal dominant disorder in which mutations cause the development of multiple osteochondromas during skeletal growth.
Malignant degeneration, most commonly into chondrosarcomas, is a possible complication.
Because the true incidence of osteochondromas is likely to be underestimated, it is hard to compare the incidence of multiple osteochondromatosis versus isolated osteochondromas.
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