one subtype is characterized by a hypodiploid chromosome number ranging from 41 to 43 and a common chromosome pattern of monosomies of chromosomes specific to this subgroup , including partial monosomy of the short arm of chromosome 1 ( 1p13 -- -- pter ) , monosomy 18 , and consistent monosomy 22 .
C0008633
chromosomes
C1520935
1p13