PDS also includes development of euthyroid goiter in late childhood to early adulthood whereas NSEVA doesn't. [from GeneReviews]????? ??? ????? ???? ????.????? ???? ??? ??? ??? ???? ?????.A variant of ependymoma, often found in the spinal wire, with tumor cells organized in fascicles of variable width and cell density.?? ??? ?? ?? ??? ??? ??? ???