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Polyagglutinability phenomenon: a case report and review of the literature.
J Med Case Rep
August 2023
Laboratoire d'hématologie, CHU Mohammed VI, Faculté de Médecine et de Pharmacie d'Oujda, Université Mohammed Premier, Oujda, Morocco.
Background: Polyagglutinability of red blood cells is a rare immunological phenomenon, it is due to a cryptic antigen that is abnormally present on the surface of red blood cells. The aim of our work is to shed light on polyagglutinability, which is still poorly understood cause of discordance between the cell and serum tests and can sometimes have harmful transfusion consequences.
Case Presentation: We report the case of a 70-year-old African patient admitted for management of hemolytic anemia.
Erythrocyte T-antigen activation in children: Patient characteristics and the hemolytic risk of transfusion.
Pediatr Blood Cancer
August 2021
Divisions of Laboratory Medicine and Hematology, Center for Cancer and Blood Disorders, Sheikh Zayed Campus for Advanced Children's Medicine, Children's National Hospital, District of Columbia, Washington.
Background: T-antigen activation usually occurs upon red blood cell (RBC) membrane cryptantigen exposure due to bacterial enzymes. Although uncommon, the condition is probably underrecognized. There is concern about hemolysis after plasma and plasma-containing platelet transfusions due to naturally occurring anti-T antibody in healthy blood donors.
View Article and Find Full Text PDFTn Red cell polyagglutination in a healthy blood donor: A case report.
Transfus Apher Sci
February 2021
All India Institute of Medical Sciences, Bhubaneswar, Odisha, India. Electronic address:
Introduction: Polyagglutination is a rare entity in immunohematology and unusually presents in a healthy blood donor. The general presentation was described in the literature in association with bacterial infections, which result in the exposure of crypt antigens. Nowadays, polyagglutination is rarely detected due to the use of monoclonal antisera.
View Article and Find Full Text PDFHematologic complications in a patient with Glycine soja polyagglutination following fresh frozen plasma transfusion.
Immunohematology
June 2017
Department of Pathology, Augusta University.
Polyagglutination is a rare and underdiagnosed condition, characterized by agglutination of red blood cells(RBCs) with almost all ABO-compatible adult sera. Polyagglutination can occur when a cryptantigen is exposed on RBCs via microbial enzyme activity. Becausenearly all adults naturally produce antibodies against cryptantigens, transfusion of plasma can cause unexpected hemolysis and hematologic complications, such as thrombocytopenia and disseminated intravascular coagulation, in patients whose cryptantigens are exposed.
View Article and Find Full Text PDFA case of extravascular hemolysis with Tk-activation.
Clin Case Rep
August 2014
Transfusion Medicine Division, Department of Pathology, University of Michigan Ann Arbor, Michigan.
A 50-year-old female with ovarian cancer for 4 years presented with abdominal pain. She started antibiotics for possible infection, and developed extravascular hemolysis. All antigen detection tests were negative, but lectin panel suggested Tk-activation.
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