scholarly journals S ignificance of recurrence of minimal residual disease detected by multi‐parameter flow cytometry in patients with acute lymphoblastic leukemia in morphological remission

2017 ◽  
Vol 92 (3) ◽  
pp. 279-285 ◽  
Author(s):  
Naveen Pemmaraju ◽  
Hagop Kantarjian ◽  
Jeffrey L. Jorgensen ◽  
Elias Jabbour ◽  
Nitin Jain ◽  
...  
Keyword(s):  
Flow Cytometry ◽  
Acute Lymphoblastic Leukemia ◽  
Minimal Residual Disease ◽  
Residual Disease ◽  
Lymphoblastic Leukemia ◽  
Minimal Residual

Minimal residual disease by flow cytometry at the end of chemotherapy for remission induction in pediatric patients with acute lymphoblastic leukemia: Experience from a center in a low-income country.

2012 ◽  
Vol 30 (15_suppl) ◽  
pp. 9554-9554
Author(s):  
Eloy Perez ◽  
Primo Cruz-Borja ◽  
Silvia Chavez-Gallegos
Keyword(s):  
Flow Cytometry ◽  
Acute Lymphoblastic Leukemia ◽  
Minimal Residual Disease ◽  
Residual Disease ◽  
Lymphoblastic Leukemia ◽  
Remission Induction ◽  
Response To Chemotherapy ◽  
Increased Risk ◽  
Cure Rates ◽  
Minimal Residual

9554 Background: The presence of minimal residual disease (MDR) following therapy for acute lymphoblastic leukemia (ALL) has been shown to be an important prognostic marker in many studies. MRD is typically detected either by polymerase chain reaction amplification or by flow cytometry. Flow-based MRD assessment has the potential for rapidly identifying patients at increased risk of relapsed, allowing for prompt changes in therapy, including earlier intensification. There are not many information about the response by MRD in countries with limited resources. Methods: The patients included were 90 ALL patients treated at the Hospital Infantil de Morelia from June 1, 2009 to January 5, 2012. MRD positivity (+) was defined as >0.01% of the gated population. Results: MRD was obtained in 90 patients, 38 males and 36 females. The median age was 7 years (10 months to 15 years). The levels of MRD were: <0.01, 74 (82.2%), 0.01-1%, 9 (10%), ≥1%, 7 (7.7%). There was not a statistically significant association between the most important ALL prognostic factors (Gender, Age at diagnosis, White blood cell count at diagnosis, Central Nervous System disease, Prednisone response, DNA Index, Immunophenotype). Conclusions: The good response found is similar to that reported by international groups, a situation which suggests that the response to chemotherapy is appropriate. However, cure rates are still not equal making it necessary to review institutional treatment protocols and social characteristics of the population to achieve cure rates reported by international groups.

Acute Lymphoblastic Leukemia (ALL): Detection of Minimal Residual Disease (MRD) at Flow Cytometry

1994 ◽  
Vol 13 (sup1) ◽  
pp. 87-90 ◽  
Author(s):  
A. Orfao ◽  
J. Ciudad ◽  
Lopez-Berges ◽  
A. Lopez ◽  
B. Vidriales ◽  
...  
Keyword(s):  
Flow Cytometry ◽  
Acute Lymphoblastic Leukemia ◽  
Minimal Residual Disease ◽  
Residual Disease ◽  
Lymphoblastic Leukemia ◽  
Minimal Residual

scholarly journals Immunological features of B-linear progenitors on the 15th day of acute lymphoblastic leukemia therapy in children. Comparison of minimal residual disease assessment protocols and own results

2020 ◽  
Vol 19 (1) ◽  
pp. 58-67
Author(s):  
O. A. Chernysheva ◽  
I. N. Serebryakova ◽  
N. A. Kupryshina ◽  
E. N. Sholokhova ◽  
M. A. Shervashidze ◽  
...  
Keyword(s):  
Flow Cytometry ◽  
Acute Lymphoblastic Leukemia ◽  
Minimal Residual Disease ◽  
Mononuclear Cells ◽  
Residual Disease ◽  
Lymphoblastic Leukemia ◽  
Disease Assessment ◽  
Main Research ◽  
First Time ◽  
Minimal Residual

Evaluation of minimal residual disease (MRD) on the 15th day of treatment of acute lymphoblastic leukemia from B-linear precursors (B-ALL) in children is of key importance in the prognosis of the disease. When evaluating the MRD, it is necessary to take into account the features of the primary immunophenotype of tumor B-lymphoblasts. To assess the MRD on the 15th day of treatment several immunological approaches have been proposed that have a general concept, but differ in fundamentally important details. The purpose of this work was to analyze the established flow cytometry (FC) protocols of the main research groups (BerlinFrankfurt-Munster Group, St. Jude Hospital, Children’s Oncology Group) and to compare the results evaluated according to those approaches. This study was approved by the Independent Ethical Committee N.N. Blokhin National Medical Cancer Research Center. The study included 131 patients with B-ALL aged 1 to 17 years (median 5.53). Pre-Pre-B immunosubvariant prevailed (92.4%). A morphological (myelogram count) and immunological (MRD assessment) study of the BM was performed in all patients on the 15th day. Comparing the FC protocols of the MRD on the 15th day, it was shown that CD10 was a more reliable criterion for the detection of B-LP in comparison with CD34. The expression of CD45 may serve as an additional criterion for the detection of B-LP. The recalculation of the mononuclear cells is a more stringent criterion for determining the MRD. The scientific novelty is that for the first time on the 15th day, a detailed comparison of flow cytometry data with a cytological picture of the bone marrow was carried out. It was shown for the first time that not all B-LP detected on the basis of CD10+ /CD19+ /CD34+ /CD45low are aberrant according to CD58/CD38.

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