<unk><unk>  osteochondromas (HMO), also known as<unk> , is a disorder characterized by the development of<unk>  benign osteocartilaginous masses<unk>  in relation to the ends of long bones of the lower limbs such as the femurs and tibias and of the upper limbs such as the humeri and forearm bones. They are also known as osteochondromas. Additional sites of occurrence include on flat bones such as the pelvic bone and scapula. The distribution and number of these<unk>  show a wide diversity among affected individuals.<unk>  usually present during childhood. The vast majority of affected individuals become clinically manifest by the time they reach adolescence. A small percentage of affected individuals are at risk for development of malignant transformation namely sarcomas. The incidence of<unk>  is around 1 in 50,000 individuals.<unk><unk>  osteochondromas is the preferred term used by the World Health Organization.
Hereditary multiple exostoses
Inherited patterned lentiginosis
Diffuse idiopathic skeletal hyperostosis
Pycnodysostosis
Familial myxovascular fibromas
Nevoid basal-cell carcinoma syndrome
Gerodermia osteodysplastica
Acrofrontofacionasal dysostosis