we used a micromethod for cytogenetic analysis from single haematopoietic colonies to study two adults with chronic myelomonocytic leukaemia ( cmml ) and a boy with juvenile chronic myeloid leukaemia ( jcml ) carrying distinct chromosome abnormalities , 7q- , der ( 21 ) , and trisomy 21 .
C0008625
chromosome
C0013080
trisomy 21