Spastic paraplegia-epilepsy-intellectual disability syndrome

Spastic paraplegia-epilepsy-intellectual disability syndrome (also known as Nakamura-Osame syndrome or spastic paraplegia with epilepsy and mental retardation) is an extremely rare neurological disorder characterized by the combination of progressive spastic paraplegia, seizures, and intellectual disability. The condition primarily affects the central nervous system, with progressive stiffness and weakness of the lower limbs (spastic paraplegia) due to degeneration of the corticospinal tracts, epileptic seizures of variable type and severity, and cognitive impairment ranging from mild to severe intellectual disability. The syndrome was originally described in a small number of families, and its genetic basis remains incompletely characterized. Onset typically occurs in childhood, with progressive spasticity of the lower extremities leading to gait difficulties, along with the development of seizures and evidence of delayed or impaired cognitive development. Additional neurological features may include hyperreflexia, extensor plantar responses, and in some cases, upper limb involvement. There is currently no curative treatment for this syndrome. Management is supportive and symptomatic, focusing on antiepileptic medications to control seizures, physical therapy and antispasticity agents (such as baclofen or tizanidine) to manage lower limb spasticity and preserve mobility, and educational and developmental support for intellectual disability. A multidisciplinary approach involving neurologists, rehabilitation specialists, and developmental pediatricians is recommended for optimal care.

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