PDS also includes advancement of euthyroid goiter in late childhood to early adulthood While NSEVA would not. [from GeneReviews]???? ??? ? ?? ??: ??? ??? ???? ???? ??? ? ????.A variant of ependymoma, normally found in the spinal twine, with tumor cells arranged in fascicles of variable width and cell density.?? ??? ?? ?? ??? ??? ??? ??? ??? ???. ?