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T- Cell prolymphocytic leukemia

In Medical Oncology
By: Dearden CE.
Contributor(s): .
Material type: materialTypeLabelArticleSeries: Vol 23 Issues 1.Publisher: 2006Description: 17-22.Subject(s): DDC classification: In: Medical OncologySummary: T-cell prolymphocytic leukemia (T-PLL) is a rare aggressive post-thymic malignancy with poor response to conventional treatment and short survival. It can readily be distinguished from other T-cell leukemias on the basis of the distinctive morphology, immunophenotype, and cytogenetics. Consistent chromosomal translocations involving the T-cell receptor gene and one of two protooncogenes (TCL-1 and MTCP-1) are seen in the majority of cases and are likely to be involved in the pathogenesis of the disorder. The CD52 antigen is expressed at high density on the malignant T-cells and therapy with alemtuzumab, a humanized IgG1 antibody that targets this antigen, has produced promising results. In relapsed/refractory patients overall and complete response rates have been seen in up to 76% and 60%, respectively. In previously untreated patients, complete remission rates of 100% have been reported. These responses are durable and translate into improved survival for responders. However, relapse is inevitable and stra
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T-cell prolymphocytic leukemia (T-PLL) is a rare aggressive post-thymic malignancy with poor response to conventional treatment and short survival. It can readily be distinguished from other T-cell leukemias on the basis of the distinctive morphology, immunophenotype, and cytogenetics. Consistent chromosomal translocations involving the T-cell receptor gene and one of two protooncogenes (TCL-1 and MTCP-1) are seen in the majority of cases and are likely to be involved in the pathogenesis of the disorder. The CD52 antigen is expressed at high density on the malignant T-cells and therapy with alemtuzumab, a humanized IgG1 antibody that targets this antigen, has produced promising results. In relapsed/refractory patients overall and complete response rates have been seen in up to 76% and 60%, respectively. In previously untreated patients, complete remission rates of 100% have been reported. These responses are durable and translate into improved survival for responders. However, relapse is inevitable and stra

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