acute lymphoblastic leukemia cell ALL cell BTO:0000731 BrendaTissueOBO Lymphocytic leukemia cell that is marked by an abnormal increase in the number of lymphoblasts, that is characterized by rapid onset and progression of symptoms which include fever, anemia, pallor, fatigue, appetite loss, bleeding, thrombocytopenia, granulocytopenia, bone and joint pain, and enlargement of the lymph nodes, liver, and spleen, and that occurs chiefly during childhood. acute lymphocytic leukemia cell lymphoblastic leukemia cell