Elsevier

Mayo Clinic Proceedings

Volume 81, Issue 2, February 2006, Pages 213-219
Mayo Clinic Proceedings

REVIEW
Human Immunodeficiency Virus-Associated Peripheral Neuropathies

https://doi.org/10.4065/81.2.213Get rights and content

Peripheral neuropathy has emerged as the most common neurologic complication of human immunodeficiency virus (HIV) infection. It will continue to play an important role in HIV infection given the fact that HIV-infected individuals are living longer, are at risk of long-term metabolic complications, and face an increasing exposure to potentially neurotoxic antiretroviral drugs. We review the various types of peripheral neuropathy that have been associated with HIV infection, including distal symmetrical polyneuropathy, toxic neuropathy from antiretroviral drugs, diffuse infiltrative lymphocytosis syndrome, inflammatory demyelinating polyneuropathies, multifocal mononeuropathies, and progressive polyradiculopathy.

Section snippets

DISTAL SYMMETRICAL POLYNEUROPATHY

Distal symmetrical polyneuropathy is the most frequent form of neuropathy in HIV-1 infection. It is detected by clinical examination in 30% of infected patients4 and in almost 100% of cases at autopsy examination of individuals with acquired immunodeficiency syndrome (AIDS).5 In one study, DSP showed a significant decline in prevalence from 42.5% in 1995-1996 to 34.4% in 1997-1998.6 In contrast, the prevalence of suspected drug-induced polyneuropathy increased to 31% compared with 20% in

TOXIC NEUROPATHY FROM ANTIRETROVIRAL DRUGS

A clinical picture resembling DSP is frequently noted during antiretroviral therapy. With the advent of HAART, the incidence of DSP has increased largely from the use of the NRTIs didanosine, zalcitabine, and stavudine. The toxic effect of NRTIs is dose dependent and is estimated to occur in 15% to 30% of patients receiving each of these drugs.14, 23, 24 Recent preliminary data, reported at the 56th Annual Meeting of the American Academy of Neurology, show an increased risk of DSP in patients

DIFFUSE INFILTRATIVE LYMPHOCYTOSIS SYNDROME

Persistent CD8 lymphocytosis, named diffuse infiltrative lymphocytosis syndrome is characterized by a persistent peripheral blood polyclonal CD8 lymphocytosis and by visceral CD8 T-cell infiltration, including salivary glands, lungs, kidneys, gastrointestinal tract, and peripheral nerves.16, 28, 29 Infiltration of the salivary glands produces a Sjögren-like disorder. Patients with DILS tend to have higher CD4 cell counts, fewer opportunistic infections, and longer survival times than typical

INFLAMMATORY DEMYELINATING POLYNEUROPATHIES

Inflammatory demyelinating polyneuropathies are disorders with acute or chronic evolving weakness in arms and legs and minor sensory symptoms. Although data from large series or controlled trials are lacking, the clinical features and the disease course of patients with acute or chronic IDP appear to be similar in HIV-1-positive and HIV-1-negative patients. Although acute and chronic IDPs occur with increasing frequency in HIV-1-infected patients, they remain rare complications of HIV-1

MONONEURITIS MULTIPLEX

Mononeuritis multiplex is a rare complication that occurs in either early or late stages of HIV-1 infection.38 When mononeuritis multiplex occurs early in HIV-1 infection, it is often the result of a self-limited dysimmune neuropathy or vasculitis. In patients with long-standing HIV-1 infection and CD4 cell counts less than 50/μL, an association with cytomegalovirus (CMV) infection has frequently been noted. Mononeuritis multiplex has also been associated with varicella zoster39 and hepatitis C

PROGRESSIVE POLYRADICULOPATHY

Progressive polyradiculopathy is an uncommon but well-described complication of HIV infection. No accurate estimates exist of the incidence of progressive polyradiculopathy associated with HIV infection. Fuller et al42 identified 54 patients (approximately 4%) with peripheral nerve syndromes among a cohort of 1500 HIV-infected patients followed up for 15 months before the introduction of HAART. Only 2 patients (0.1%) had progressive polyradiculopathy. The incidence of HIV-associated progressive

PN ASSOCIATED WITH IMMUNE RECONSTITUTION

HAART has been associated with numerous immune reconstitution illnesses, which generally occur within 6 months after its introduction and are thought to constitute an aberrant immune response to opportunistic pathogens.64, 65, 66, 67 Makela et al68 described the occurrence of a probable recurrent Guillain-Barré syndrome 6 weeks after initiation of HAART and after a striking increase in CD4 cell count in 1 HIV-infected individual. Piliero et al69 described an HIV-infected patient with AIDS who

CONCLUSION

Peripheral neuropathy is the most frequent neurologic complication of HIV infection or its treatment. The spectrum and the frequency of this complication are expected to change with continued experience and introduction of new antiretroviral drugs, an aging HIV-infected population, and the emergence of other long-term complications of HIV and/or its treatment. There is a great need for an improved understanding of these complications and their pathogenetic mechanisms as well as for the

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