Peripheral neuropathy associated with eosinophilia-myalgia syndrome.
Publication/Presentation Date
10-1-1990
Abstract
In 1989, the Centers for Disease Control recognized the existence of an epidemic illness characterized by myalgia and eosinophilia in individuals taking preparations containing L-tryptophan. We evaluated 3 patients with eosinophilia-myalgia syndrome who presented with subacute progressive neuropathies. The neuropathies were predominantly motor and maximal in the lower extremities. Two patients were confined to a wheelchair and one was ventilator-dependent and bedridden. Sensory loss predominantly involved small fiber modalities. Electrophysiological studies showed multifocal marked conduction slowing and conduction block indicating segmental demyelination, with associated axonal degeneration that was accentuated distally. Examination of sural nerve biopsy specimens demonstrated axonal degeneration in all 3 patients and perivascular infiltrates in 2. Levels of quinolinic acid, a neurotoxic metabolite of L-tryptophan, were elevated in the cerebrospinal fluid in the 2 patients in whom it was measured. The cause of the neuropathy is unknown but may include immune mechanisms or toxicity of eosinophils, L-tryptophan, its metabolic products, or contaminants within L-tryptophan preparations.
Volume
28
Issue
4
First Page
522
Last Page
528
ISSN
0364-5134
Published In/Presented At
Heiman-Patterson, T. D., Bird, S. J., Parry, G. J., Varga, J., Shy, M. E., Culligan, N. W., Edelsohn, L., Tatarian, G. T., Heyes, M. P., & Garcia, C. A. (1990). Peripheral neuropathy associated with eosinophilia-myalgia syndrome. Annals of neurology, 28(4), 522–528. https://doi.org/10.1002/ana.410280409
Disciplines
Medicine and Health Sciences
PubMedID
2174666
Department(s)
Department of Medicine
Document Type
Article