Using peripheral smear review, age and absolute lymphocyte count as predictors of abnormal peripheral blood lymphocytoses diagnosed by flow cytometry

Using peripheral smear review, age and absolute lymphocyte count as predictors of abnormal peripheral blood lymphocytoses diagnosed by flow cytometry

Absolute lymphocytosis in the elderly raises the possibility of malignancy and generally warrants further investigation. To better correlate clinical variables with the frequency of neoplastic lymphoid processes in this population, we retrospectively reviewed archived flow cytometric analyses from p...

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Bibliographic Details
Published in:Leukemia & lymphoma Vol. 49; no. 9; pp. 1731 - 1737
Main Authors: Andrews, Jared M., Cruser, Dan L., Myers, Jerome B., Fernelius, Colby A., Holm, Mitchel T., Waldner, Dale L.
Format: Journal Article
Language:English
Published: United States Informa UK Ltd 01-01-2008
Taylor & Francis
Subjects:
Age Factors
Aged
Aged, 80 and over
Diagnostic Techniques and Procedures
Female
Flow Cytometry - methods
Humans
Immunophenotyping
Lymphocyte Count
lymphocytes
Lymphocytosis - diagnosis
Lymphoid leukemia
Lymphoproliferative Disorders - diagnosis
Male
Middle Aged
Predictive Value of Tests
prognostication
Retrospective Studies
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Summary:Absolute lymphocytosis in the elderly raises the possibility of malignancy and generally warrants further investigation. To better correlate clinical variables with the frequency of neoplastic lymphoid processes in this population, we retrospectively reviewed archived flow cytometric analyses from peripheral blood specimens on patients of 50 years of age and older that had been deemed suspicious for a lymphoproliferative process after peripheral smear review. Age, absolute lymphocyte count (ALC), white blood cell count and relative lymphocyte count were correlated with the results of flow cytometry. Of 71 total cases, 42 (59%) had an abnormal immunophenotype. Independent variables that showed significant differences between normal and abnormal immunophenotype were mean age (p = 0.001) and ALC (p = 0.0032). We combined age and absolute lymphocyte count variables to look for the best possible cutoff values to predict the likelihood of an abnormal immunophenotype. ALC cutoff values of ≥4 × 109 cells L for patients over 67 years of age, and >6.7 × 109 cells L for patients between 50 and 67 years of age, had a high sensitivity for detecting an abnormal immunophenotype.
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ISSN:1042-8194
1029-2403
DOI:10.1080/10428190802251787