M02.35

Clinical Causes: Infections, particularly bacterial infections such as Chlamydia trachomatis (genitourinary infections) or gastrointestinal bacteria like Salmonella, Shigella, Yersinia, and Campylobacter. Genetic predisposition, notably the presence of the HLA-B27 gene, which increases susceptibility. Environmental factors such as stress or trauma can potentially influence the development of reactive arthritis in some cases.

Key Symptoms: Pain, swelling, and stiffness in the hip joint Reduced range of motion due to joint inflammation Pain that worsens with activity and improves with rest Possible redness and warmth around the affected joint Additional symptoms may include conjunctivitis (eye inflammation), urinary symptoms, or skin rashes, depending on the extent of the reaction Systemic symptoms like fever, fatigue, and malaise sometimes accompany joint symptoms

Diagnosis Path: Diagnosing Reiter's disease involving the hip involves a combination of clinical evaluation and laboratory testing. Doctors will typically perform the following steps: - Detailed medical history focusing on recent infections or exposures - Physical examination to assess joint swelling, tenderness, and range of motion - Blood tests: checking for markers of inflammation such as elevated ESR and CRP, and testing for HLA-B27 gene association - Microbiological tests: analyzing urine, stool, or joint fluid for bacterial infections - Imaging studies like X-rays or MRI scans to evaluate joint damage or inflammation Because symptoms can resemble other joint disorders, ruling out conditions such as rheumatoid arthritis or gout is essential for an accurate diagnosis.

Treatment Protocols: Managing Reiter's disease affecting the hip focuses on relieving symptoms, controlling inflammation, and addressing the underlying infection if identified. Treatment options include: - Nonsteroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen or naproxen to reduce inflammation and pain - Corticosteroids, either oral or injectable, for severe inflammation - Physical therapy to improve joint function, flexibility, and strengthen surrounding muscles - Antibiotics, if a bacterial infection is identified, to eradicate the infectious source - Disease-modifying antirheumatic drugs (DMARDs) like sulfasalazine or methotrexate in chronic or persistent cases - Rest and activity modification to prevent joint overload Early diagnosis and intervention can help minimize joint damage and improve mobility. Long-term management may involve regular monitoring and supportive therapies to maintain joint health.