Asian Journal of Transfusion Science
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Clinical significant anti-P1 antibody with wide thermal amplitude: A tale of successful blood management

 Department of Transfusion Medicine, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India

Correspondence Address:
Nallagondla Thulasiram,
Department of Transfusion Medicine, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/ajts.ajts_165_21

The P blood group system was introduced in 1927 by Landsteiner and Levine. About 75% of the population possesses P1 phenotype. P2 simply implies P1 negative and there is no P2 antigen. Individuals with P2 may have anti-P1 antibodies in there serum are cold-reacting antibodies which are clinically insignificant and occasionally active at 20°C or higher temperatures. However, in certain cases, anti-P1 is clinically significant and may cause acute intravascular hemolytic transfusion reactions. Our case report confirms the complexity and difficulty in the diagnosis of anti-P1. In India, very few cases are reported regarding clinical significant anti-P1. Here, we report a case of IgM type of antibody anti-P1 which was reactive at 37°C and AHG phase in a 66-year-old female planned for Whipple's surgery, who had grouping discrepancies in reverse typing and incompatibility during routine crossmatch.

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2006 - Asian Journal of Transfusion Science | Published by Wolters Kluwer - Medknow
Online since 10th November, 2006