Exostoses- multiple
Hereditary multiple exostoses (HME) is characterized by growths of multiple exostoses, benign cartilage-capped bone tumors that grow outward from the metaphyses of long bones. Exostoses can be associated with a reduction in skeletal growth, bony deformity, restricted motion of joints, shortened stature, premature osteoarthrosis, and compression of peripheral nerves. The median age of diagnosis is three years; nearly all affected individuals are diagnosed by twelve years of age. The risk for malignant degeneration to osteochondrosarcoma increases with age, although the lifetime risk of malignant degeneration is low (~1%).
