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