M30.2

Clinical Causes: The exact cause of juvenile polyarteritis is unknown. It is believed to result from an abnormal immune response that mistakenly attacks the body's own blood vessels. Genetic factors may play a role, with certain genetic predispositions increasing susceptibility. Environmental triggers such as infections are suspected to potentially trigger or exacerbate the condition, although no direct link has been firmly established.

Key Symptoms: Fever lasting more than a few days Fatigue and general malaise Muscle and joint pain or swelling Skin rashes or purpura (purple spots or patches) Abdominal pain, nausea, or vomiting Weakness or numbness in limbs High blood pressure Blood in urine or kidney problems Organ-specific symptoms depending on areas affected

Diagnosis Path: Detailed medical history and physical examination Blood tests to assess inflammation markers such as ESR and CRP Imaging studies like angiography to visualize blood vessels Biopsy of affected tissue to confirm the presence of vasculitis Urinalysis to detect kidney involvement Additional tests to evaluate organ function, such as liver and kidney panels

Treatment Protocols: Corticosteroids such as prednisone to control inflammation Immunosuppressive medications like cyclophosphamide or azathioprine Biologic agents in severe cases, targeting specific immune pathways Supportive care including pain relievers and antihypertensives Regular monitoring of organ function and disease activity Lifestyle modifications to manage symptoms and prevent complications