Nerve and skin biopsy in neuropathies

Area of Science:

• Neurology
• Pathology
• Diagnostic Medicine

Background:

• Neuropathies encompass a range of disorders affecting peripheral nerves.
• Accurate diagnosis is crucial for effective management and treatment.
• Advancements in biopsy techniques offer new diagnostic insights.

Purpose of the Study:

• To review recent data on nerve and skin biopsy utility in diagnosing neuropathies.
• To highlight the diagnostic role of biopsies in various neuropathy types.
• To discuss the evolving applications of biopsy in neuropathic conditions.

Main Methods:

• Review of recent literature on nerve and skin biopsies in neuropathy diagnosis.
• Analysis of findings from nerve biopsies, including axonal damage and autophagy.
• Evaluation of skin biopsy applications for small fiber neuropathy differentiation.

Main Results:

• Nerve biopsy remains essential for diagnosing peripheral nerve vasculitis.
• Biopsies can reveal autoantibodies in chronic inflammatory demyelinating polyradiculoneuropathy and unexpected familial amyloid neuropathy.
• Skin biopsy effectively differentiates small fiber neuropathies and aids in etiological diagnosis.

Conclusions:

• Nerve biopsy is the gold standard for peripheral nerve vasculitis diagnosis.
• Skin biopsy is a routine method for diagnosing small fiber neuropathy.
• Biopsy techniques, including immunofluorescence staining, enhance understanding of neuropathic pathophysiology.