Abstract
Generally, within the ABO blood group system, the AB group is subdivided into two subtypes, A(1)B and A(2)B, with the A(2)B subtype considered to be the rarest and the A(1)B subtype the most common. Given that the A(2)B subtype is the rarest one, its presence is associated with many challenges. In this report, we present the case of a child with a chronic hemolytic disease with the A(2)B blood group but without anti-A1 lectin antibodies, as well as the challenges encountered.