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Nerve biopsy--some comments on procedures and indications.

S I Mellgren1, S Lindal

  • 1Neuromuscular Research Group, Department of Clinical Medicine and Department of Medical Biology, University of Tromsø, Tromsø, Norway. svein.ivar.mellgren@uit.no

Acta Neurologica Scandinavica. Supplementum
|June 30, 2011
PubMed
Summary

Nerve biopsy is a crucial diagnostic tool for peripheral neuropathy, especially inflammatory types like nerve vasculitis. Careful patient selection and high-quality lab processing are essential for accurate results and to manage potential side effects.

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Area of Science:

  • Neurology
  • Pathology
  • Surgical Procedures

Background:

  • Peripheral neuropathy evaluation often culminates in nerve biopsy.
  • The procedure carries risks including sensory loss and chronic pain, necessitating informed consent.
  • Standard clinical, electrophysiological, and laboratory tests should precede biopsy.

Purpose of the Study:

  • To outline the indications, procedures, and laboratory requirements for nerve biopsy.
  • To emphasize the importance of informed consent and risk-benefit assessment.
  • To highlight the diagnostic utility of nerve biopsy in specific neuropathies.

Main Methods:

  • Biopsy of peripheral nerves, commonly the sural or superficial peroneal nerve.
  • Laboratory processing including paraffin, cryostat, and epoxy sections, teased fibers, light and electron microscopy, and immunohistochemistry.

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  • Consideration of morphometry and routine use of teased fiber analysis for detailed pathological assessment.

    • Main Results:

    • Nerve biopsy is primarily indicated for inflammatory neuropathies, particularly to identify nerve vasculitis.
    • Small fiber neuropathy is best evaluated via skin biopsy and intraepidermal nerve fiber quantification.
    • High standards in surgical technique and laboratory processing are critical for diagnostic accuracy.

    Conclusions:

    • Nerve biopsy is a valuable, albeit final, step in diagnosing specific peripheral neuropathies.
    • Proper patient selection, informed consent, and meticulous laboratory analysis are paramount.
    • Teased fiber analysis offers superior visualization of axonal and myelin pathology.