[Paraneoplastic Disorders of Peripheral Nervous System]

Area of Science:

• Neurology
• Oncology
• Immunology

Background:

• Paraneoplastic disorders of the peripheral nervous system are immune-mediated syndromes linked to underlying tumors.
• Sensory neuronopathy, a key phenotype, results from dorsal root ganglia neuronal injury.
• Peripheral nervous system symptoms frequently herald tumor discovery.

Purpose of the Study:

• To review the clinical characteristics and management of paraneoplastic peripheral nervous system disorders.
• To highlight the association between these disorders and specific cancers, particularly small-cell lung cancer.
• To discuss the role of antineuronal antibodies in diagnosis and prognosis.

Main Methods:

• Literature review of paraneoplastic neurological disorders affecting the peripheral nervous system.
• Analysis of clinical phenotypes, diagnostic markers (antineuronal antibodies), and associated malignancies.
• Evaluation of treatment strategies, including tumor resection and immunotherapy.

Main Results:

• Sensory neuronopathy is a common presentation, characterized by dorsal root ganglia damage.
• Small-cell lung cancer is frequently observed in patients with these disorders.
• Antineuronal antibodies are detected in a subset of affected individuals.
• Tumor resection and immunotherapy show potential for clinical improvement.

Conclusions:

• Paraneoplastic peripheral nervous system disorders necessitate a high index of suspicion for underlying malignancy.
• Prompt diagnosis and multidisciplinary treatment, combining oncology and neurology, are crucial.
• Early intervention, including tumor removal and immunotherapy, may stabilize or improve neurological function.