Case 31

1. Presented by Eric A. Gehrie, MD and prepared by Lorraine N. Blagg, MA, MLS(ASCP)SBB

Clinical Vignette

An elderly patient with squamous cell cancer of the head and neck undergoing immunotherapy and radiation was admitted by emergency medical services after bleeding from the mass that soaked through the dressing. Upon physical exam, the patient had a blood pressure of 82/47, pulse of 94, temperature of 98.6°F, and a SpO2 of 93%. One unit of emergency release RBC was taken from the emergency department remote allocation refrigerator. A type and screen was drawn and sent to the laboratory.

Transfusion Medicine results:


Antibody Screen:

Repeat ABO/Rh typing:

What is the most likely explanation of the patient's results?