juxtaposition (plural juxtapositions) 1  The nearness of objects with little or no delimiter. 2  The extra emphasis given to a comparison when the contrasted objects are close together.
Hemolytic disease of the newborn (HDN), also known as alloimmune HDN or erythroblastosis fetalis, is a potentially fatal alloimmune condition where fetal red blood cells are destroyed by transplacentally acquired maternal antibodies. RhD is the most common offending paternal antigen.
Hemolytic disease of the newborn is characterized by one or more of the following clinical presentations: Rapidly progressive severe hyperbilirubinemia or prolonged hyperbilirubinemia. Positive maternal antenatal antibody findings and/or diagnosis of anemia or fetal hydrops.