Sickle cell disease is an inherited blood disorder that affects red blood cells. People with sickle cell disease have red blood cells that contain mostly hemoglobin S, an abnormal type of hemoglobin.

Sickle cell disease (SCD) is a group of hereditary red blood cell disorders. Sickle cell anemia is a type of SCD that occurs when a person inherits genes containing an atypical form of hemoglobin.

Sickle cell thalassemia occurs when you inherit both a sickle cell gene mutation and a thalassemia gene mutation. Symptoms are similar to other types of sickle cell disease but can vary depending on ...