Osteochondrosis is a family of orthopedic diseases of the joint that occur in children, adolescents and rapidly growing animals, particularly pigs, horses, dogs, and broiler chickens. They are characterized by interruption of the blood supply of a bone, in particular to the epiphysis, followed by localized bony necrosis, and later, regrowth of the bone. This disorder is defined as a focal disturbance of endochondral ossification and is regarded as having a multifactorial cause, so no one thing accounts for all aspects of this disease.Osteochondrosis is a developmental disease. It usually occurs in an early stage of life. It has personified features as focal chondronecrosis and confinement of growth cartilage due to a failing of endochondral ossification. Fissures can develop from lesions over the top articular cartilage and form a cartilage flap and an osteochondral fragment. It is diagnosed as osteochondritis dissecans. In animals
In dogs osteochondrosis is seen in elbow, shoulder, knee, and ankle joints. Elbow osteochondrosis is also known as "elbow dysplasia". There are three types of elbow dysplasia:  fragmented medial coronoid process, ununited anconeal process and Osteochondritis dissecans of the medial humeral condyle. Breeds that have the predisposition to these are Basset Hound, Labrador, Golden Retriever, and Rottweiler. Other breeds can also be diagnosed with this condition but it is not common.One of the leading factors to some elbow osteochondrosis is that the radius and ulna are growing at different rates.
Articular: Legg-Calvé-Perthes disease (or, avascular necrosis of the femoral head in the hip), Köhlers disease (of the tarsal navicular bone of the foot), Freibergs infraction (of the second or third metatarsal of the foot and less frequently the first or fourth; sometimes called Freibergs Infraction or Freibergs disease), Blounts disease (tibia vara), Kienböcks disease (lunate),  Panners disease (of the capitulum of the elbow). Other entities affecting mostly adults, but sometimes loosely lumped into these conditions include Preisers disease (scaphoid) and Mueller-Weiss syndrome (tarsal navicular). Non-articular: This group includes Severs disease (of the calcaneus, or heel), and other conditions not completely characteristic of the osteochondroses, such as Osgood-Schlatters disease (of the tibial tubercle) and Sinding-Larsen-Johansson syndrome (proximal patellar tendon). Treatment
There are many different kinds of treatments. One is to remove the loose piece of the leg. Or serving the branch of the lumbar muscle and ulnas attachment.Most of the time if the osteochondrosis is in the shoulder joint, the veterinarian diagnoses it from X-rays or CT scans. Some studies show that osteochondrosis is more popular in male dogs than in female dogs. Prognosis
The term osteochondrosis has been used to describe a wide range of lesions among different species. There are different types of the prognosis: latens, which is a lesion restricted to epiphyseal cartilage, manifesta, a lesion paired with a delay in endochondral ossification, and dissecans which is a cleft formation in the articular cartilage.