M87: Osteonecrosis

M87.0: Idiopathic aseptic necrosis of bone

Idiopathic aseptic necrosis of bone is a condition in which a portion of bone loses its blood supply and begins to die. This can cause the bone to collapse and can lead to pain and decreased mobility of the joint involved. The term 'idiopathic' means that the exact cause of this condition is unknown. It is termed 'aseptic' because the bone dies not due to an infection but because of a lack of blood supply. This condition can affect any bone in the body, but it is more common in the hip, knee, or shoulder. The symptoms may include joint pain, difficulty in moving the affected joint, and potential deformation depending on the severity of the condition. As the disease progresses, the symptoms may gradually worsen. Since this condition involves the skeletal system, it can have a substantial impact on an individual's lifestyle and physical capabilities.