Early lineage switch from T-acute lymphoblastic leukaemia to common B-all.

Hafiza, A and Azura, AH and Azma, RZ and Azlin, I and Zarina, AL and Hamidah, NH (2011) Early lineage switch from T-acute lymphoblastic leukaemia to common B-all. Medicine & Health, 6 (2). pp. 131-138. ISSN 1823-2140


Official URL: http://www.ppukm.ukm.my/ukmmcjournal


Leukaemic stem cells have heterogenous differentiation potential. The immunophenotypes of blast cells are usually consistent throughout the disease course even at relapse. Rarely, blast cells may undergo a ‘lineage switch’ during the course of disease especially during relapse. We would like to highlight such a case in a 10-year old boy who presented with a two weeks history of lethargy, poor appetite, low grade fever, respiratory distress, cardiac failure, generalized oedema and hepatosplenomegaly. Full blood count showed a leucocyte count of 41.5x109/L and platelet count of 37x109/L. The peripheral blood film showed presence of numerous blast cells. Bone marrow aspiration revealed a hypercellular marrow, which consisted of mainly blast cells with high nuclear to cytoplasmic ratio and inconspicuous nucleoli. Immunophenotyping and cytochemistry results were consistent with the diagnosis of T-cell acute lymphoblastic leukaemia. The patient achieved remission after treatment with UK ALL 97 protocol, regime B chemotherapy. However, he relapsed seven months after the initial diagnosis with 26% blast cells in the bone marrow aspirate. The majority was L1 blast cells admixed with some L2 blast cells. Immunophenotyping was consistent with common precursor B acute lymphoblastic leukaemia. The treatment was changed to a more lineage specific chemotherapy. Nonetheless, the patient never achieved remission and was planned for palliative management. This case illustrated a unique and rare case of rapid lineage switch from T-cell acute lymphoblastic leukaemia to common precursor B-cell acute lymphoblastic leukaemia.

Item Type:Article
Keywords:early lineage switch; T-acute lymphoblastic leukaemia; B- acute lymphoblastic leukaemia.
Journal:Medicine & Health
ID Code:5326
Deposited By: Mr. Muhammad Wafi -
Deposited On:09 Jul 2012 04:25
Last Modified:14 Dec 2016 06:38

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