direct bone marrow preparations revealed the presence of two leukemic clones 46 , xy , del ( 6 ) ( q23q25 ) and 45 , x , -4 , del ( 6 ) ( q23q25 ) , +8 , -15 , -21 , +i ( 21q ) , +mar , the former clearly indicating that male donor cells were involved in the malignant process .
C1521075
21q
C0007634
cells