Spastic paraplegia four (SPG4; often known as SPAST-HSP) is characterized by insidiously progressive bilateral lower-limb gait spasticity. Over fifty% of impacted people today have some weakness from the legs and impaired vibration sense with the ankles.????? ??? ????? ???? ????.????? ???? ??? ??? ??? ???? ?????.A variant of ependymoma, frequently