Andrea, Are these cells PI Neg.? Don Celltech-Chiroscience Bothell, WA Phone: 425.489.8110 -----Original Message----- From: Andrea Illingworth [mailto:dcdsflow@mint.net] Sent: Monday, April 10, 2000 8:03 AM To: cyto-inbox Subject: CD4/CD8 coexpression in pb We have noticed occasional cases with a fair amount of CD4/CD8 coexpression in peripheral bloods (up to 10% coexpression within the lymphoid gate). Most of these cases show no CMC or morphological abnormalities and we are not sure about the clinical significance of this findings. Does anybody know a "non-malignant" explanation for this finding? QC of these antibodies looks fine. Thanks for your help! Andrea J. Illingworth, M.S. (ASCP) Dahl-Chase Diagnostic Services Flow Cytometry 333 State Street Bangor, Maine 04401
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