The hemoglobin C trait is the presence of an abnormal type of the
oxygen-carrying substance in red blood cells (hemoglobin) called hemoglobin C.
People who have hemoglobin C trait also have some normal hemoglobin (hemoglobin A)
so they rarely have problems from the condition, but they can pass on the trait
to their children.
A person who has hemoglobin C with little or no normal hemoglobin
has hemoglobin C disease. Hemoglobin C disease produces a mild type of anemia
that occurs because the red blood cells containing abnormal hemoglobin break
E. Gregory Thompson, MD - Internal Medicine & Joseph O'Donnell, MD - Hematology, Oncology