Familial steroid-responsive neuropathy

Area of Science:

• Neurology
• Genetics
• Immunology

Background:

• Hereditary sensory neuropathies (HSNs) are a group of genetic disorders affecting peripheral nerves.
• Four classic types of HSNs are well-documented, but atypical presentations can occur.
• Understanding novel subtypes is crucial for accurate diagnosis and treatment.

Observation:

• A family presented with a neuropathy not fitting established HSN classifications.
• Muscle biopsy revealed inflammatory cell infiltration and perivascular cuffing, indicative of vasculitis.
• The clinical presentation mimicked idiopathic polyneuritis.

Findings:

• A distinct hereditary sensory neuropathy was diagnosed in three family members.
• Histological findings suggested a polyneuritis-like process with vasculitis.
• Patients experienced a dramatic positive response to corticosteroid therapy.

Implications:

• This case expands the spectrum of known hereditary sensory neuropathies.
• The presence of vasculitis in HSN may indicate a treatable inflammatory component.
• Steroid therapy could be a viable option for managing this specific neuropathy subtype.