| lymphoblast | <haematology> Often referred to as a blast cell. Unlike other usages of the suffix blast a lymphoblast is a further differentiation of a lymphocyte, T or B, occasioned by an antigenic stimulus. The lymphoblast usually develops by enlargement of a lymphocyte, active re entry to the S phase of the cell cycle, mitogenesis and production of much mRNA and ribosomes. (18 Nov 1997) |
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