????? ??? ??, ?? ??? ??? ??? ? ?? ?? ??????. ???? ???? ??? ? ?? ?? ??? ?????.?? ????? ???? ??? ???? ?? ??? ? ?? ???? ??? ? ????. ?? ????? ??? ????? ??? ???? ?? ???? ??????!A chromosomal abnormality consisting from the absence of one of the copies of chromosome 7 in somatic cells. [from NCI]????? ?????? ?????? ?? ?? ????? ??? ??? ?????. ?? ???? ???