Assertion: t cell lymphoblast | /r/HasProperty | immature white blood cells
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Source sentences:
text: T-lymphoblastic leukemia/lymphoma (WHO 2008),:219 previously labeled precursor T-lymphoblastic leukemia/lymphoma (WHO 2001):219 is a form of lymphoid leukemia and lymphoma in which too many T-cell lymphoblasts (immature white blood cells) are found in the blood, bone marrow, and tissues, particularly mediastinal lymph nodes.:635