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Nerve biopsy in patients with AIDS
E E Calore1, G Shulte, A C Penalva De Oliveira
1Department of Pathology, Emilio Ribas Institute, Sao Paulo, Brazil.
Pathologica
|June 18, 1998
Summary
Peripheral nervous system involvement in patients with Acquired Immunodeficiency Syndrome (AIDS) can stem from various causes. Sural nerve biopsy is crucial for diagnosing nerve vasculitis in AIDS patients, potentially altering treatment strategies.
Area of Science:
- Neurology
- Immunology
- Pathology
Background:
- Peripheral nervous system (PNS) involvement is a common clinical manifestation in patients with Acquired Immunodeficiency Syndrome (AIDS).
- The etiology of PNS complications in AIDS is diverse, necessitating accurate diagnostic methods.
Purpose of the Study:
- To investigate the histopathological changes in sural nerve biopsies of patients with AIDS presenting with clinical PNS involvement.
- To identify specific pathological findings that may guide therapeutic decisions.
Main Methods:
- Sural nerve biopsy was performed on fifteen patients diagnosed with AIDS and exhibiting clinical signs of peripheral neuropathy.
- Histopathological examination included light microscopy, and in some cases, electron microscopy and teasing of nerve fibers.
- Specific attention was paid to identifying vasculitis and axonal damage.
Main Results:
- Polyarteritis nodosa-like vasculitis with fibrinoid necrosis was identified in the sural nerves of 3 patients.
- One case of vasculitis was associated with cytomegalovirus (CMV) polyradiculitis.
- Mild axonal loss was observed in 6 patients, while 3 others showed significant axonal neuropathy with myelin ovoids and axonal damage confirmed by electron microscopy.
- Three patients had normal sural nerve biopsies.
Conclusions:
- Sural nerve biopsy is a valuable diagnostic tool for peripheral neuropathies and myelo-radiculo-polyneuropathies in AIDS patients.
- The identification of nerve vasculitis through biopsy can significantly impact treatment strategies.
- Early diagnosis of specific neuropathological conditions, such as vasculitis, is critical for effective management in AIDS patients.