ABSTRACT
Objective To investigate the clinical and genetic characteristics of hereditary spastic paraplegia(HSP).Methods The clinical material of 113 patients in 39 families with HSP was analyzed retrospectively.Results The ratio of male to female was 1:1.17.The age at HSP onset was from 2 to 58 years old, the mean age was 21.4 years old, and 81.7% of the patients had HSP before 30. 89.4% of the patients had positive family history and they showed mostly autosomal dominant inheritance. The rate of consanguinity was 28.2%. 24 cases had pure while 89 cases had complicated spastic paraplegia. In the HSP group, we could found the weakness of legs in 65.5% patients, spasticity and hyperreflexia of lower limbs in 96.5%, extensor plantar responses in 68.1%, ataxia in 46.9%, muscular atrophy in 32.7% and dementia in 18.6%.Conclusion In the HSP group, the year of onset was mostly before 30. The female HSP cases were more than the male's, and the complicated cases were more often than the pure. Autosomal dominant was the mostly frequent inheritance, and there were more chances of HSP in the consanguineous families.