Source:http://linkedlifedata.com/resource/umls/id/C0229613
CSP: a morphologically immature lymphocyte, once thought to represent an early stage in lymphocyte development but now known to be an activated lymphocyte that has been transformed in response to antigenic stimulation.,NCI: A lymphocyte that has gotten larger after being stimulated by an antigen. Lymphoblast also refers to an immature cell that can develop into a mature lymphocyte.,NCI: An immature lymphocyte that has enlarged in response to antigenic stimulation.