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The page below is a sample from the LabCE course ABO Typing Discrepancies. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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A patient's pretransfusion ABO grouping results are as follows:

Forward (Cell) Grouping

Reverse (Serum) Grouping

Anti-A
Anti-B
Anti-A,B
A1 Cells
B Cells
4+
0
4+
0
0

What is the MOST likely ABO group for this patient and what ABO typing discrepancy is most descriptive of these findings?

Please select the single best answer