Any of a group of bone disorders involving one or more ossification centers (epiphyses). It is characterized by degeneration or necrosis followed by revascularization and reossification. osteochondrosis often occurs in children causing varying degrees of discomfort or pain. There are many eponymic types for specific affected areas, such as tarsal navicular (Kohler disease) and tibial tuberosity (Osgood-Schlatter disease).