Peripheral neuropathy in cerebrotendinous xanthomatosis

Area of Science:

• Neurology
• Clinical Electrophysiology
• Rare Genetic Diseases

Background:

• Cerebrotendinous xanthomatosis (CTX) is a rare autosomal recessive sterol lipidosis.
• Characterized by abnormal accumulation of bile alcohols, particularly cholestanol, in tissues.
• Neurological and psychiatric manifestations are common, but peripheral nerve involvement is not well-defined.

Observation:

• Electrophysiologic investigations were performed on four patients diagnosed with CTX.
• Assessment included motor and sensory nerve conduction studies.
• Clinical evaluation for peripheral neuropathy symptoms was also conducted.

Findings:

• All four CTX patients exhibited impaired peripheral nerve function.
• Electrophysiology revealed significantly slowed motor and sensory nerve conduction velocities.
• The degree of nerve conduction impairment correlated with disease severity and patient age, with older, more advanced cases showing greater deficits.
• Mild clinical signs of peripheral neuropathy were observed in these patients.

Implications:

• Peripheral nerve damage is a consistent finding in cerebrotendinous xanthomatosis.
• Electrophysiologic studies are valuable for detecting subclinical peripheral neuropathy in CTX.
• These findings highlight the systemic impact of CTX and suggest the need for monitoring peripheral nerve health in affected individuals.