I have a dumb question. I always thought that NK cells were CD4-, CD5- and CD25-. Now I am presented with a "NK-cell" leukemia that is CD5+, CD2+, CD3-, CD4+, CD8-, CD57+, CD56-, CD16- and (here's the kicker) TRCab+. This smells like a CD3- T-cell tumor to me. Any thoughts? Anyone seen this before? Maryalice Maryalice Stetler-Stevenson Director Flow Cytometry Unit Laboratory of Pathology, NCI, NIH
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