[Hereditary spastic paraplegia associated with congenital cataracts, mental retardation and peripheral neuropathy].

A 16-year-old male patient was admitted to our hospital with mental retardation and a gradually increasing gait disturbance. He fell easily at age 6, and lost the ability to jump at age 12. At age 13, he lost the ability to run, and developed pes cavus and hammer toes. Spastic paraplegia with mental retardation, congenital cataracts, hyper reflexia, dysarthria, callosal hypogenesis and peripheral neuropathy were evident at age 16. Laboratory examinations did not reveal any underlying disorders. He was diagnosed as having complex spastic paraplegia with cataracts, mental retardation and peripheral neuropathy that might comprise a genetically distinct entity that is unique to Japan, because all prior reports of this combination have been generated only from Japan.