PDS also includes improvement of euthyroid goiter in late childhood to early adulthood whereas NSEVA doesn't. [from GeneReviews]?? ????? ???? ??? ???? ?? ??? ? ?? ???? ??? ? ????. ?? ????? ??? ????? ??? ???? ?? ???? ??????!A chromosomal abnormality consisting in the absence of among the copies of chromosome seven in somatic cells. [from NCI]????