Two cases of hematuria with hemoglobin C trait.

Patients with sickle cell disease commonly experience painless hematuria. Hematuria may be found in patients with sickle cell trait, sickle cell anemia, and sickle cell hemoglobin C disease, but it is believed to be uncommon in patients with other hemoglobinopathies, such as hemoglobin C disease and hemoglobin C trait. We report two cases of children with hemoglobin C trait who presented with persistent painless hematuria. Because it is possible that hematuria in a patient with hemoglobin C trait is purely coincidental, all patients with a hemoglobinopathy and hematuria should undergo a complete evaluation so as not to overlook other causes of hematuria.