PDS also contains development of euthyroid goiter in late childhood to early adulthood whereas NSEVA isn't going to. [from GeneReviews]???? ??? ? ?? ??: ??? ??? ???? ???? ??? ? ????.A chromosomal abnormality consisting of your absence of one of the copies of chromosome 7 in somatic cells. [from NCI]?? ??? ?? ?? ??? ??? ??? ??? ??? ???. ?? ???? ??