A Very Low Birth Weight Infant with Severe Red Blood Cell Polyagglutination; A Case Report

Polyagglutination is a rare condition in which cryptic erythrocyte membrane antigens (T, Th, Tk, Tn) on the surface of erythrocytes react with anti-T antibodies present in adult serum [1]. Although it does not cause agglutination in umbilical cord serum, anti-T antibodies are gradually produced in newborns after the first few months of life