M06.03

Clinical Causes: Autoimmune response where the immune system mistakenly attacks the synovial lining of the joints Genetic predisposition increasing susceptibility Environmental factors such as smoking or exposure to certain pollutants Hormonal influences, particularly in women Unknown precise trigger, as is common with many autoimmune conditions

Key Symptoms: Persistent pain in the wrist that can worsen with activity Swelling and tenderness around the joint Morning stiffness lasting more than an hour Reduced wrist mobility and stiffness after periods of inactivity Potential warmth and redness over the affected area Possible signs of systemic inflammation like fatigue or mild fever in some cases

Diagnosis Path: Diagnosing rheumatoid arthritis without rheumatoid factor involves a combination of clinical evaluation and laboratory tests. Physicians typically review symptoms and perform physical examinations focused on joint swelling, tenderness, and movement. Additional diagnostic approaches may include: - Blood tests to rule out other conditions and assess inflammation levels, such as erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP) - Imaging studies like X-rays, ultrasound, or MRI to identify joint erosion or synovial inflammation - Examination of synovial fluid if joint aspiration is performed to exclude infections or other types of arthritis The absence of rheumatoid factor in blood tests characterizes this subtype, but other indicators of inflammation support the diagnosis.

Treatment Protocols: Management aims to control inflammation, alleviate symptoms, and prevent joint damage. Treatment strategies can include: - Disease-modifying antirheumatic drugs (DMARDs) to slow disease progression - Nonsteroidal anti-inflammatory drugs (NSAIDs) for pain and inflammation relief - Corticosteroids for short-term symptom control during flare-ups - Physical therapy to improve joint function and strength - Regular monitoring and adjustments based on disease activity - In some cases, biologic agents may be considered if conventional treatments are insufficient Lifestyle modifications, such as maintaining a healthy weight, engaging in low-impact exercises, and avoiding joint overuse, can also be beneficial.