lymphoblastosis

The presence of lymphoblasts in the peripheral blood; sometimes used as a synonym for acute lymphocytic leukemia. [lymphoblast + G. -osis, condition]

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lym·pho·blas·to·sis -.blas-'tō-səs n, pl -to·ses -.sēz the presence of lymphoblasts in the peripheral blood (as in acute lymphocytic leukemia or infectious mononucleosis)

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lym·pho·blas·to·sis (lim″fo-blas-toґsis) excess of lymphoblasts in the blood, as seen in lymphoblastic leukemia.