Chromosome abnormalities in acute lymphoblastic leukemia
Less information is available on the cytogenetic abnormalities in marrow cells of patients with acute lymphoblastic leukemia (ALL) than on abnormalities in acute nonlymphocytic leukemia (ANLL); nonetheless, some patterns of karyotypic change in ALL are evident. Even with banding, about 50% of patients appear to have a normal karyotype. The modal chromosome number tends to be higher in ALL than in ANLL. Every patient with B-cell ALL has had an abnormality of one chromosome No. 14 that involved the translocation of material to the end of the long arm. Among seven reported cases, the translocation was from 8q in three patients and 11q in one. Cells with a haploid or near-haploid (24 to 35) chromosome number have been reported in five patients with ALL and in four patients in a lymphoid blast crisis of chronic myelogeneous leukemia. The karyotype in the four ALL patients whose cells were analyzed with banding was remarkably consistent. All patients had the haploid number, usually with both sex chromosomes, plus an additional No. 10, 18, and 21. Evolution of the karyotype, which occurs in the leukemic cells of about 50% of patients, involves cells of patients who had an initially normal or an initially abnormal karyotype. The evidence regarding a correlation between the presence of an abnormal clone prior to treatment and response to treatment is contradictory at present. Some chromosome abnormalities, such as the presence of a Philadelphia (Ph/sup 1/) chromosome, a 14q+chromosome, or a haploid clone, are associated with a relatively short survival.
- Research Organization:
- Univ. of Chicago, IL
- OSTI ID:
- 6579195
- Journal Information:
- Cancer Genet. Cytogenet.; (United States), Journal Name: Cancer Genet. Cytogenet.; (United States) Journal Issue: 3 Vol. 1; ISSN CGCYD
- Country of Publication:
- United States
- Language:
- English
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59 BASIC BIOLOGICAL SCIENCES
62 RADIOLOGY AND NUCLEAR MEDICINE
ANIMALS
BIOLOGICAL EFFECTS
BIOLOGY
CELL CULTURES
CHROMOSOMAL ABERRATIONS
CLONE CELLS
DISEASES
GENETIC EFFECTS
GENETICS
HEMIC DISEASES
KARYOTYPE
LEUKEMIA
MAMMALS
MAN
MUTATIONS
NEOPLASMS
PATHOLOGY
PRIMATES
VERTEBRATES