Change of blood group from A2 to Ax in a child with congenital abnormalities.

AUTOR(ES)
RESUMO

A blood group change from A2 to Ax is described in a boy who had Fallot's tetralogy, oesophageal atresia, and a tracheo-oesophageal fistula. The change of blood group created a transfusion problem. The unusual serology is discussed.

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