Involvement of the cerebrospinal fluid (CSF) by hematopoietic malignancies may be difficult to document by morphology alone. The diagnoses of """"""""atypical"""""""" or """"""""suspicious"""""""" is frequently used in cases with low numbers of cells or ambiguous morphology. In a study comparing morphology alone to morphology with flow cytometry, we demonstrated that flow cytometric immunophneotyping was useful in establishing a diagnosis of neoplasia in a series of patients with known lymphoma or leukemia and an initial diagnosis of """"""""atypical"""""""" or """"""""suspicious"""""""" CSF using morphologic criteria. The Flow Cytometry Unit evaluated the role of flow cytometric analysis in staging and management of patients with high grade B cell lymphomas. We assessed the cerebrospinal fluid (CSF) by flow cytometry and cytology in patients newly diagnosed with aggressive B-cell lymphomas and at risk for central nervous system (CNS) involvement. Flow cytometry identified neoplastic clones that constituted as little as 0.2% of total CSF lymphocytes. Flow cytometry detected involvement where cytology, chemistry and cell counts failed. Flow cytometric detection of disease was a negative prognostic factor and now prompts therapeutic intervention in patients on NCI protocols. As a result of the study we recommended that patients at risk for CNS involvement by aggressive B cell lymphoma undergo staging CSF evaluation by flow cytometry. Many flow cytometry laboratories report a low success rate in analysis of CSF specimens. The Flow Cytometry Unit, CCR, NCI, NIH developed special protocols for flow cytometric analysis of CSF that has led to a high success rate. The Flow Cytometry Unit participated in an international consensus conference to determine optimal methodology for flow cytometric analysis of CSF. The Flow Cytometry Unit has helped Vanderbilt University Medical Center implement our system and is currently assisting University of Pittsburgh Medical Center.

Agency
National Institute of Health (NIH)
Institute
National Cancer Institute (NCI)
Type
Scientific Cores Intramural Research (ZIC)
Project #
1ZICBC011093-06
Application #
8763762
Study Section
Project Start
Project End
Budget Start
Budget End
Support Year
6
Fiscal Year
2013
Total Cost
$226,251
Indirect Cost
Name
National Cancer Institute Division of Basic Sciences
Department
Type
DUNS #
City
State
Country
Zip Code
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Kreitman, Robert J; Stetler-Stevenson, Maryalice; Jaffe, Elaine S et al. (2016) Complete Remissions of Adult T-cell Leukemia with Anti-CD25 Recombinant Immunotoxin LMB-2 and Chemotherapy to Block Immunogenicity. Clin Cancer Res 22:310-8
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