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.
Key words: Vel isoimmunization, hemolytic disease of the newborn Vel antigen is a high-incidence antigen present 10 >99.9% of the population.I Anti-Vel sensitization is known to be a potential cause of hemolytic transfusion reactions; however, its potential to cause hemolytic disÂ­ease of the newborn has not been well studied.I. 2 We report a case ofanti-Vel isoimmunization that was presÂ­ent during pregnancy, which did not result in hemolytic disease of the newborn.