Clinical significance of early T-cell precursor acute lymphoblastic leukaemia: results of the Tokyo Children's Cancer Study Group Study L99-15

Summary Early T‐cell precursor acute lymphoblastic leukaemia (ETP‐ALL) is a recently identified subtype of T‐ALL with distinctive gene expression and cell marker profiles, poor response to chemotherapy and a very high risk of relapse. We determined the reliability of restricted panel of cell markers...

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Veröffentlicht in:British journal of haematology 2012-02, Vol.156 (3), p.358-365
Hauptverfasser: Inukai, Takeshi, Kiyokawa, Nobutaka, Campana, Dario, Coustan-Smith, Elaine, Kikuchi, Akira, Kobayashi, Miyuki, Takahashi, Hiroyuki, Koh, Katsuyoshi, Manabe, Atsushi, Kumagai, Masaaki, Ikuta, Koichiro, Hayashi, Yasuhide, Tsuchida, Masahiro, Sugita, Kanji, Ohara, Akira
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container_issue 3
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container_title British journal of haematology
container_volume 156
creator Inukai, Takeshi
Kiyokawa, Nobutaka
Campana, Dario
Coustan-Smith, Elaine
Kikuchi, Akira
Kobayashi, Miyuki
Takahashi, Hiroyuki
Koh, Katsuyoshi
Manabe, Atsushi
Kumagai, Masaaki
Ikuta, Koichiro
Hayashi, Yasuhide
Tsuchida, Masahiro
Sugita, Kanji
Ohara, Akira
description Summary Early T‐cell precursor acute lymphoblastic leukaemia (ETP‐ALL) is a recently identified subtype of T‐ALL with distinctive gene expression and cell marker profiles, poor response to chemotherapy and a very high risk of relapse. We determined the reliability of restricted panel of cell markers to identify EPT‐ALL using a previously classified cohort. Then, we applied the cell marker profile that best discriminated ETP‐ALL to a cohort of 91 patients with T‐ALL enrolled in the Tokyo Children’s Cancer Study Group L99‐15 study, which included allogeneic stem cell transplantation (allo‐SCT) for patients with poor prednisone response. Five of the 91 patients (5·5%) met the ETP‐ALL criteria. There were no significant differences in presenting clinical features between these and the remaining 86 patients. Response to early remission induction therapy was inferior in ETP‐ALL as compared with T‐ALL. The ETP‐ALL subgroup showed a significantly poorer event‐free survival (4‐year rate; 40%) than the T‐ALL subgroup (70%, P = 0·014). Of note, three of four relapsed ETP‐ALL patients survived after allo‐SCT, indicating that allo‐SCT can be effective for this drug‐resistant subtype of T‐ALL.
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We determined the reliability of restricted panel of cell markers to identify EPT‐ALL using a previously classified cohort. Then, we applied the cell marker profile that best discriminated ETP‐ALL to a cohort of 91 patients with T‐ALL enrolled in the Tokyo Children’s Cancer Study Group L99‐15 study, which included allogeneic stem cell transplantation (allo‐SCT) for patients with poor prednisone response. Five of the 91 patients (5·5%) met the ETP‐ALL criteria. There were no significant differences in presenting clinical features between these and the remaining 86 patients. Response to early remission induction therapy was inferior in ETP‐ALL as compared with T‐ALL. The ETP‐ALL subgroup showed a significantly poorer event‐free survival (4‐year rate; 40%) than the T‐ALL subgroup (70%, P = 0·014). 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Malignant lymphomas. Malignant reticulosis. 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We determined the reliability of restricted panel of cell markers to identify EPT‐ALL using a previously classified cohort. Then, we applied the cell marker profile that best discriminated ETP‐ALL to a cohort of 91 patients with T‐ALL enrolled in the Tokyo Children’s Cancer Study Group L99‐15 study, which included allogeneic stem cell transplantation (allo‐SCT) for patients with poor prednisone response. Five of the 91 patients (5·5%) met the ETP‐ALL criteria. There were no significant differences in presenting clinical features between these and the remaining 86 patients. Response to early remission induction therapy was inferior in ETP‐ALL as compared with T‐ALL. The ETP‐ALL subgroup showed a significantly poorer event‐free survival (4‐year rate; 40%) than the T‐ALL subgroup (70%, P = 0·014). Of note, three of four relapsed ETP‐ALL patients survived after allo‐SCT, indicating that allo‐SCT can be effective for this drug‐resistant subtype of T‐ALL.</abstract><cop>Oxford, UK</cop><pub>Blackwell Publishing Ltd</pub><pmid>22128890</pmid><doi>10.1111/j.1365-2141.2011.08955.x</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record>
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subjects acute lymphoblastic leukaemia
Adolescent
allogeneic stem cell transplantation
Antigens, CD - analysis
Antigens, Neoplasm - analysis
Antineoplastic Combined Chemotherapy Protocols - therapeutic use
Biological and medical sciences
cell marker profile
Child
Child, Preschool
childhood
Combined Modality Therapy
Disease-Free Survival
Drug Resistance, Neoplasm
Early T-cell precursor
Female
Hematologic and hematopoietic diseases
Humans
Immunophenotyping
Infant
Japan - epidemiology
Kaplan-Meier Estimate
Leukemias. Malignant lymphomas. Malignant reticulosis. Myelofibrosis
Male
Medical sciences
Precursor T-Cell Lymphoblastic Leukemia-Lymphoma - classification
Precursor T-Cell Lymphoblastic Leukemia-Lymphoma - drug therapy
Precursor T-Cell Lymphoblastic Leukemia-Lymphoma - epidemiology
Precursor T-Cell Lymphoblastic Leukemia-Lymphoma - surgery
Prednisone - administration & dosage
Remission Induction
Stem Cell Transplantation
Transplantation, Homologous
Treatment Outcome
title Clinical significance of early T-cell precursor acute lymphoblastic leukaemia: results of the Tokyo Children's Cancer Study Group Study L99-15
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