??? ??? ?? ? ? ?? ?? ??? ????? ??? ?? ??? ???? ??? ???? ?????.????? ??? ????? ???? ????.????? ???? ??? ??? ??? ???? ?????.A chromosomal abnormality consisting on the absence of one of many copies of chromosome seven in somatic cells. [from NCI]?? ??? ?? ?? ??? ??? ??? ??? ??? ???. ?? ???? ??? ??? ?? ??? ?? ??? ??? ??? ???.???? ??? ??? ??? ???. ??