A 17-year-old white female was admitted to the ER for melena. A CBC showed the hemoglobin to be 9.0%, hematocrit 27%, WBC 32,000/mm with 21% polys, 7% bands, 70% lymphocytes, and 2% monocytes. Platelet count was 20,000/ mm'. Bone marrow aspiration and smear shows evidence of lymphoblasts.

 1. What was the patient's admitting symptom?

 A. Diarrhea B. Blood in her stool C. Vomiting blood D. Spitting up blood

 2. What do the lab data tell about RBCs?

 A. None of the tests reflect information about RBCS B. RBCs are normal C. RBCs are elevated D. RBCs are decreased as evidenced by low hematocrit and hemoglobin

 3. What is a likely diagnosis for the patient?

 A. Sickle cell anemia B. Hemophilia C. Acute lymphoblastic leukemia D. Chronic myelocytic leukemia

 4. The bone marrow was filled with:

 A. Immature white blood cells B. Mature neutrophils C. Platelets D.Immature red blood cells