A 60-year-old male has a hemoglobin of 9 g/dL. He also has the following lab results: MCV normal; LDH increased; haptoglobin decreased. Which of the following is most likely?

The reticulocyte production index (RPI) corrects the hematocrit to a normal value of which percentage, and takes into account the maturation time of the reticulocyte at a particular hematocrit?

Choose the valence orbital diagram that represents the ground state of Se2⁻.

Alloimmune hemolytic anemia may result from:

Anti-K was detected in a patient’s serum 1 year ago in a routine antibody screen. This patient was transfused red cells containing antigen specific for anti-K. Forty-eight hours later the patient began exhibiting signs of a hemolytic anemia. What type of transfusion reaction is present?

What can cause extracorpuscular hemolytic anemia?

Although sickle cell trait is usually asymptomatic, sickling can still occur when caused by which of the following?

ADVANCED CONCEPTS A patient who usually takes metformin was switched to insulin immediately following an angiogram. Which patient finding indicates it is safe for the patient to switch back to metformin?

Where does extravascular phagocytosis of red cells occur?

The morphologic hallmark of HS hereditary spherocytosis on the peripheral blood smear is: