<unk>  can arise from a variety of causes including nutritional, genetic, traumatic, idiopathic or physiologic and infectious. Rickets=== Nutritional rickets is an important cause of childhood<unk>  or knock knees in some parts of the world. Nutritional rickets arises from unhealthy life style habits as insufficient exposure to sun light which is the main source of vitamin D. Insufficient dietary intake of calcium is another contributing factor.<unk>  may arise from rickets caused by genetic abnormalities, called vitamin D-resistant rickets or X-linked hypophosphatemia. Osteochondrodysplasia=== Osteochondrodysplasia are a variable group of genetic bone diseases or genetic skeletal dysplasias that present with generalized bone deformities involving all extremities and the spine.<unk>  or knock knees is one of the known skeletal manifestations of Osteochondrodysplasias. A complete bone X-ray survey is mandatory to reach a definitive diagnosis.
Genu valgum
Oral torus
Caput medusae
Caput Medusae
Dens invaginatus
Pinguecula
Genu varum
Frenulum breve