G98.0

Clinical Causes: Nerve damage due to diabetes mellitus leading to peripheral neuropathy Spinal cord injuries affecting nerve signals to the joints Multiple sclerosis causing nerve impairment Syphilitic infections (though this case is nonsyphilitic as specified) Other neurological disorders that disrupt normal sensation and proprioception Trauma or surgical injury affecting nerve pathways Degenerative nerve conditions leading to loss of sensory function

Key Symptoms: Progressive joint swelling and abnormal shape Reduced or lost joint sensation, leading to unnoticed injuries Persistent joint pain or discomfort Joint instability and deformity Reduced mobility or stiffness in the affected joint Signs of joint destruction such as bone irregularities visible on imaging Possible skin changes over the affected joints, including ulcers or redness

Diagnosis Path: Physical examination to evaluate joint deformity, swelling, and sensation Imaging studies such as X-rays, MRI, or CT scans to assess joint damage and bone integrity Electromyography (EMG) and nerve conduction studies to identify nerve damage Laboratory tests to rule out infectious causes and other joint diseases Assessment of the patient’s neurological status to establish underlying nerve impairment

Treatment Protocols: Joint protection strategies such as splinting or orthotic supports Pain management through medications like analgesics or non-steroidal anti-inflammatory drugs (NSAIDs) Physical therapy to maintain joint function and muscle strength Regular monitoring for joint integrity and early detection of further deterioration Addressing nerve damage through medical or surgical interventions when possible Preventive measures including skin care and injury prevention due to decreased sensation In advanced cases, surgical interventions such as joint stabilization or replacement may be considered