M90.539

Clinical Causes: Trauma or injury to the forearm that disrupts blood flow Use of high-dose corticosteroids or other medications that impair bone blood supply Chronic medical conditions such as sickle cell disease or autoimmune disorders Alcohol abuse which can interfere with blood circulation to bones Certain infections that affect blood vessels or bone tissue Radiation therapy affecting the forearm bones Underlying diseases that compromise vascular health or bone integrity

Key Symptoms: Localized pain in the forearm, which may worsen with activity or pressure Swelling or tenderness around affected bones Limited range of motion or weakness in the forearm Bone tenderness or sensation of crunching in the joint area Possible visible deformity or limb shortening if bone collapse occurs Persistent aching that can intensify over time if untreated

Diagnosis Path: Medical history review focusing on recent trauma, medication use, or underlying health issues Physical examination to assess pain, swelling, and range of motion Imaging tests such as X-rays to detect bone changes or collapse MRI scans to identify early signs of osteonecrosis and assess blood flow to the bone Bone scans may be used to evaluate bone activity and health Laboratory tests to identify underlying conditions contributing to osteonecrosis

Treatment Protocols: Pain management with medications like NSAIDs or other analgesics Rest and activity modification to reduce stress on the affected forearm Physical therapy to improve strength and mobility Surgical interventions such as core decompression to relieve pressure and stimulate blood flow Bone grafts or graft substitutes in cases of bone collapse Joint replacement procedures if the joint is severely damaged Treating underlying conditions that contribute to osteonecrosis, such as adjusting medications or managing autoimmune diseases