M14.66

Clinical Causes: Diabetes mellitus (most common cause) Syphilis or other infectious diseases affecting nerves Trauma-related nerve injury Multiple sclerosis Alcoholic neuropathy Herniated disc leading to nerve compression Congenital nerve disorders

Key Symptoms: Swelling of the knee that may be disproportionate to the degree of pain Joint deformity and instability Localized warmth and redness around the knee Reduced or lost sensation in the affected joint Difficulty bearing weight or walking Crepitus or a grinding sensation during joint movement Progressive joint destruction and disfigurement

Diagnosis Path: Diagnosis of Charcot's joint of the knee typically involves a combination of clinical evaluation, imaging studies, and laboratory tests: - **Physical Examination:** Detection of joint swelling, deformity, warmth, and sensory deficits. - **Imaging Tests:** X-rays may reveal bone destruction, joint dislocation, loss of joint space, and new bone formation. MRI can provide detailed information about soft tissues and early changes. - **Laboratory Tests:** Blood tests to rule out infection or inflammatory conditions. - **Joint Aspiration:** Sometimes performed to exclude septic arthritis. Early diagnosis is crucial to prevent severe joint destruction and to develop an effective management plan.

Treatment Protocols: Management of Charcot's joint of the knee focuses on preventing further joint damage, maintaining function, and improving quality of life: - **Immobilization:** Use of braces, casts, or supportive devices to stabilize the joint and prevent additional injury. - **Offloading:** Minimizing weight-bearing activities to protect the joint, often with crutches or wheelchairs. - **Infection Prevention and Control:** If an active infection is present, or to prevent infection, appropriate antibiotic therapy may be necessary. - **Surgical Intervention:** In advanced cases, procedures such as joint fusion (arthrodesis), amputation, or joint replacement may be considered. - **Management of Underlying Condition:** Controlling blood sugar levels in diabetic patients or treating nerve disorders can help slow disease progression. - **Multidisciplinary Approach:** Collaboration among orthopedic surgeons, neurologists, endocrinologists, and physiotherapists ensures comprehensive care.