??? ??? ?? ? ? ?? ?? ??? ????? ??? ?? ??? ???? ??? ???? ?????.???? ??? ? ?? ??: ??? ??? ???? ???? ??? ? ????.A chromosomal abnormality consisting in the absence of among the copies of chromosome seven in somatic cells. [from NCI]?? ??? ?? ?? ??? ??? ??? ??? ??? ???. ?? ???? ??? ??? ?? ??? ?? ??? ??? ??? ???.Hereditary paraganglioma-pheochromocytom