Spastic paraplegia 4 (SPG4; often called SPAST-HSP) is characterized by insidiously progressive bilateral reduce-limb gait spasticity. A lot more than fifty% of affected men and women have some weak spot inside the legs and impaired vibration feeling for the ankles.???? ??? ? ?? ??: ??? ??? ???? ???? ??? ? ????.A variant of ependymoma, typically fo