CD Mnemonic

The mnemonic is "T" for "Tiny" CDs and "T-cells" referring to the fact that typically the Tiny CDs (CD1, 2, 3, 4, 5, 6, 7, & 8) are expressed in T-cells as opposed to "B" for "B-cells" & "Bigger" CDs (CD19, 20, 21, 22, 23, and 24) which are typically expressed in "B-cells". The "Middle" CDs (CD11, 12, 13, 14, 15, 16, 17 & 18) are more commonly expressed in "MyeloMonocytic" (M for Middle and M for Myelomonocytic referring to granulocytes and monocytes). Note: The above mnemonic is mainly for the normal T-cells, Myeloid cells and B-cells. Abberant expression may be seen in other lineages in diseased states and some common examples include the expression of the T-cell marker CD7 on abnormal myeloblasts in some AMLs or the abnormal expression of the T-cell marker CD5 on CLL or Mantle Cell Lymphoma.