<unk>  is the chromosome mutation of leukemic cells with 45 chromosomes or less. It has been determined that the prognosis of<unk>  is much less than standard acute lymphoblastic leukemia. The lower the chromosome count, the lower the survival rate. In a study documented by the American Society of Hematology 17 of 27 patients relapsed, which indicates poor treatment responsiveness of<unk>  ALL.<unk>  is an unfavorable karyotypic feature in childhood ALL.
Hypodiploid acute lymphoblastic leukemia
B-cell prolymphocytic leukemia
Acute myeloblastic leukemia with maturation
T-cell prolymphocytic leukemia
Precursor B-cell lymphoblastic leukemia
Juvenile myelomonocytic leukemia
Atypical chronic myeloid leukemia
T-lymphoblastic leukemia/lymphoma