CD19 is expressed by normal and neoplastic B cells but is not expressed by T cells, monocytes or granulocytes. CD19 protein appears early during B-cell maturation and is found during all stages of B-cell maturation, including plasma cells. CD19 is useful as an additional marker of B cell lineage in leukemias and lymphomas. Expression of CD19 may be seen in some Acute myeloid leukemias.
- Cd 19
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