A 10 year old girl was hospitalized because her urine had a distinct red color. The patient had recently recovered from an upper respiratory infection and appeared very pale and lethargic. Tests were performed with the following results: Hemoglobin: 5 g/dL Reticulocyte count: 15% DAT: weak reactivity with poly-specific and anti-C3; anti-IgG was negative Antibody screen: negative Donath-Landsteiner test: positive; QC passed That patient probably has:

The In(Lu) gene inhibits the Lutheran blood group system and also which of the following? 

A patient has reactive anti-K, anti-E, anti-M, and anti-Fyb present in his serum. Yikes! You decide to treat the panel cells with AET to see if there are any other antibodies present. Which antibody would be nonreactive with the AET panel? 

How long does it take for P1 antigen to be fully expressed?

Which of the following is true regarding the Kell antigen?

In the process of identifying an antibody, a 2+ reaction with 3 of the 8 cell panel was observed after immediate spin. The reaction disappeared at 37oC and after AHG phase. The antibody is most likely: 

Which of the following antibodies is most likely to be involved in hemolytic disease of the fetus and newborn?

What MN phenotype is found in highest frequency in the white population?

A female patient has had 3 previous pregnancies. Her first baby was healthy, the second was jaundiced at birth and required an exchange transfusion, and the third was stillborn. Which of the following is the most likely cause?

Anti-N is identified in a patient’s serum. If random crossmatches are performed on 10 donor units, how many would be expected to be compatible?