PDS also consists of improvement of euthyroid goiter in late childhood to early adulthood whereas NSEVA doesn't. [from GeneReviews]????? ??? ????? ???? ????.????? ???? ??? ??? ??? ???? ?????.A variant of ependymoma, typically found in the spinal wire, with tumor cells arranged in fascicles of variable width and mobile density.????? ?????? ?????? ?