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[Hereditary spastic paraplegias].

Hereditary spastic paraplegias (HSP) are characterised by symmetric spastic paraplegia, pallhypaesthesia, and urinary dysfunction (uncomplicated HSP). Complicated HSP is present if uncomplicated HSP additionally presents with epilepsy, dementia, cataract, extrapyramidal dysfunction, amyotrophy, polyneuropathy, or ichthyosis. Clinically, HSP are similar but genetically even more heterogeneous. The disease course is slowly progressive and, the earlier the disease onset, the slower the course. Causes of HSP are mutations in 20 different genes, of which eight have been identified so far. A single …