An 82-year-old patient shows 4+ agglutination with anti-A and no reaction with anti-B on forward typing. Rever…

Question

An 82-year-old patient shows 4+ agglutination with anti-A and no reaction with anti-B on forward typing. Reverse typing shows no reaction with A1 cells and no reaction with B cells. What is the most likely explanation?

Accepted Answer

보기 3: The patient is group A with weak or absent expected antibody

Forward typing indicates group A, but the expected anti-B is missing in the reverse typing. This is a weak or absent expected antibody, seen in elderly, newborn, and immunocompromised patients. A group O patient would show no reaction in forward typing, and rouleaux causes extra reactivity in reverse typing rather than missing reactivity.

Answer

보기 1: The patient is group O with a cold autoantibody

Answer

보기 2: The patient is group AB with rouleaux formation

Answer

보기 4: The patient has an acquired B antigen

성장을 멈추지 마세요

An 82-year-old patient shows 4+ agglutination with anti-A and no reaction with anti-B on forward typing. Reverse typing shows no reaction with A1 cells and no reaction with B cells. What is the most likely explanation?

마이메르시로 국가고시 완벽 대비