ABSTRACT
Human T-cell lymphotropic virus type I (HTLV-1) is a human retrovirus and the etiologic
agent for a progressive neurological disease called HTLV-1-associated myelopathy/tropical
spastic paraparesis (HAM/TSP). With its primary site of involvement occurring at the
thoracic spinal cord level, HAM/TSP is characterized by muscle weakness, hyperreflexia,
lower extremity spasticity, and urinary disturbance. However, HAM/TSP has also been
associated with other autoimmune disorders as well as widespread dysfunction within
the nervous system that results in less frequent symptoms of cerebral, cerebellar,
and cranial nerve involvement. Although masked by the more prominent myelopathy, involvement
of the peripheral nervous system also occurs. Syndromes of anterior horn cell, peripheral
nerve, and muscle dysfunction have been reported.
KEYWORDS
HTLV-I infection - HAM/TSP - neuromuscular - neuropathy - myopathy
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Gregory GruenerM.D. M.B.A.
Department of Neurology, Loyola University Chicago, Stritch School of Medicine
2160 South First Avenue, Maywood, IL 60156