osteochondritis dissecans is an ocd lesion of the knee.
osteochondritis dissecans is an ocd lesion of the knee.
what is an ocd lesion of the knee?
osteochondritis dissecans
x-rays show lucency of the ossification front in juveniles. in older people, the lesion typically appears as an area of osteosclerotic bone with a radiolucent line between the osteochondral defect and the epiphysis. the visibility of the lesion depends on its location and on the amount of knee flexion used. harding described the lateral x-ray as a method to identify the site of an ocd lesion.
osteochondritis dissecans
early onset ocd, manifesting in childhood or adolescence, is a subtype of ocd etiologically distinct from adult onset ocd. this early onset ocd is reported to be genetically related to tic disorders and tourette’s syndrome, as one study has found that patients with early onset ocd have a higher rate of tourette’s and other tic disorders. family association studies have suggested that early onset ocd is correlated to increased familial and possibly genetic risk. the rate of ocd and subclinical ocd among relatives of probands whose ocd manifested in childhood or adolescence was at least twice as high as the rate among relatives of probands whose ocd manifested in adulthood. other studies have also indicated that there is an inverse relationship between the age of onset of the proband and the risk of ocd in relatives. consequently, it is possible that there are different genetic mechanisms behind the two types of ocd; therefore, it may be necessary to control for age of onset when examining candidate genes.
cause of obsessive-compulsive disorder