A paraparesia espástica tropical (PET) é uma mielopatia crônica progressiva e em muitos casos tem etiologia retroviral (HTLV-1), quando é denominada mielopatia associada ao HTLV-1 (MAH/PET). Cerca de 433 casos de PET têm sido descritos no Nordeste e Sudeste do Brasil, dos quais 157 (36,2%) são HTLV-1 positivos e 276 (63,7%) são negativos. A média de idade dos pacientes é de 43,8 anos. Ocorre discreto predomínio de mulheres e mulatos, embora haja numerosos pacientes brancos. Clinicamente todos os pacientes exibem uma paraparesia espástica com variável distúrbio sensitivo e esfincteriano. Dor e sintomas autonômicos parecem expressivos nos pacientes brasileiros com MAH/PET HTLV-1 positivos.

Tropical spastic paraparesis (TSP) is a chronic progressive myelopathy and in most of the cases has a retroviral (HTLV-1) etiology, when it is denominated HTLV-1 associated-mielopathy (HAM/TSP). Around 433 cases of TSP have been described in Northeast and Southeast Brazil. Among these cases, 157 (36.2%) are HTLV-1 positive and 276 (63.7%) are negative. Their mean age is 43.8 years with a slight predominance of females and mulattoes, although white patients are also numerous. Clinically all patients exhibit a spastic paraparesis with variable sphincter and sensory disturbance. Pain and autonomic symptoms seem to be expressive in the HTLV-1 positive HAM/TSP Brazilian patients.

Os autores apresentam 10 casos de provável paraparesia espástica tropical (PET) oriundos do Nordeste do Brasil (Hospital das Clínicas - Universidade Federal do Ceará). Os sintomas consistem de fraqueza dos membros inferiores, marcha espástica, hiperreflexia, disfunção esfincteriana e sinais variados de distúrbio proprioceptivo. Outras etiologias de mielopatias foram excluídas pelos exames complementares. A idade dos pacientes ia de 21 a 59 anos, todos eram da raça negra e havia discreto predomínio de mulheres. Recentemente, tem-se atribuído ao retrovírus HTLV-I a etiologia da PET. Por falta de condições técnicas ainda não pudemos determiná-la em nossos pacientes.

Ten possible cases of tropical spastic paraparesis (TSP) in Northeastern Brazil (Ceará) are presented. They show the typical symptoms and signs of TSP consisting of weakness of the lower limbs, spastic gait, hiperreflexia, bladder dysfunction and variable signs of posterior columns impairment. The laboratory examinations excluded other compressive, infective, degenerative or demyelinating lesions of their spinal cord. Our patients age ranged from 21 to 59 years, all were of black origin and all were of lower social class. There was a slight preponderance of females. An etiological implication of a retrovirus (HTLV-I) has been shown for TSP, but for lack of technical conditions we could not determine it in our patients, and that stands as our subsequent step in those and further cases.