Reverse typing on a patient shows unexpected reactivity with both A1 cells and B cells at immediate spin, but the reactions disappear when the test is prewarmed to 37 degrees Celsius. What is the most likely cause?
1A warm autoantibody
2A cold reacting autoantibody✓ 정답
3An alloantibody to a high-incidence antigen
4An ABO subgroup
해설
Reactivity that appears at immediate spin and disappears after prewarming to 37 degrees Celsius is characteristic of a cold reacting autoantibody. A warm autoantibody reacts better at 37 degrees Celsius, and an alloantibody to a high-incidence antigen does not disappear with prewarming.