Flow Cytometric DNA Index and Karyotype in Childhood Lymphoblastic Leukemia
نویسندگان
چکیده
Flow cytometric DNA-index (DI(FCM)) and karyotype were analysed in 82 consecutive children with acute lymphoblastic leukemia (ALL) during a 10 year period. A statistically significant correlation existed between modal chromosome number and DI(FCM) (p = 0.009). DI(FCM) could reliably identify leukemias with >51 chromosomes, whereas only three out of 12 cases with modal chromosome numbers between 47-51 were classified as aneuploid by DI(FCM). In the pseudodiploid group only one out of 20 leukemias had a DI(FCM) > 1.0. Five leukemias with a diploid karyotype showed an aneuploid DI(FCM) and in three patients the flow cytometric measurement revealed biclonality undetected by karyotyping. During treatment aneuploid clones could be detected by DI(FCM) in a substantial number of cases where the cytogenetic analysis was normal, and the opposite was also demonstrated in one case. DI(FCM) gave prognostic information, showing that cases with a DI > 1.12 (corresponding to 51 chromosomes) had a superior outcome with treatment protocols today in use.
منابع مشابه
FMS-like Tyrosine Kinase-3 Mutation in a Child with Standard-risk ALL and Normal Karyotype
FMS-like tyrosine kinase-3 is a receptor tyrosine kinase expressed by immature hematopoietic cells and is important for the normal development of stem cells and the immune system. Mutations of FMS-like tyrosine kinase-3 have been detected in about 30% of patients with acute myelogenous leukemia and a small number of patients with acute lymphoblastic leukemia. The FMS-like tyrosine kinase-3 muta...
متن کاملAssocition between LAPTM4B gene polymorphism and the risk of childhood acute lymphoblastic leukemia
Introduction: Evidence suggests that Lysosome associated protein transmembrane 4B (LAPTM4B) contributes to the risk of numerous cancers. The present study aimed to find out the impact of LAPTM4B polymorphism on the risk of childhood acute lymphoblastic leukemia (ALL) in the southeastern Iranian population. Materials and Methods: A total of 230 subjects including 110 children diagnosed with ALL ...
متن کاملUse of Four-Color Flow Cytometric Assay for Discrimination of Hematogone from Lymphoblast: Critical Issue for MRD Assessment in B-ALL Patients
Background: Hematogones are normal B-cell precursor which can be seen in different physiological and pathological conditions. Due to variation in B-cell acute lymphoblastic leukemia (B-ALL) blasts immunophenotyping and interference of hematogones in minimal residual disease (MRD) assessment, precise discrimination of hematogones is very crucial. The purpose of this study was to evaluate the ex...
متن کاملCharacterization of Immunophenotypic Aberrancies in Adult and Childhood Acute Lymphoblastic Leukemia: Lessons from Regional Variation
Background & Objective: Although the antigen expression patterns of acute lymphoblastic leukemia (ALL) are well known, this study attempted to evaluate commonly used immune markers for immunophenotyping of acute leukemia to set the minimum of necessary diagnostic panels by flow cytometry. Methods: This study evaluated 89 patients referred from all over th...
متن کاملImmunophenotyping of childhood acute lymphoblastic leukemia in Qazvin; A cross-sectional study
Background: Acute Lymphoblastic Leukemia (ALL) is the most prevalent cancer in childhood. ALL is a heterogeneous type of malignancy and treatment protocols vary based on the immunological classification of ALL. The critical step for treating ALL is immunological subgroup identification by flow cytometry findings. In this study, for the first time, immunophenotypic information was evaluated in c...
متن کامل