Aprolymphocyte is awhite blood cell with a certain state ofcellular differentiation inlymphocytopoiesis. In the 20th century it was believed that a sequence of generalmaturation changed cells fromlymphoblasts to prolymphocytes and then tolymphocytes (the lymphocytic series),[2] with each being a precursor of the last. Today it is believed that the differentiation of cells in the lymphocyte line is not always simply chronologic but rather depends on antigen exposure, such that, for example, lymphocytes can become lymphoblasts.[2]
The size is between 10 and 18 μm.[3]
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