<prompt> Answer this question truthfullyWhat does congenital dyserythropoietic anemia mean?  <response>: <reason> Congenital dyserythropoietic anemia CDA is a rare blood disorder, similar to the thalassemias. CDA is one of many types of anemia, characterized by ineffective erythropoiesis, and resulting from a decrease in the number of red blood cells RBCs in the body and a less than normal quantity of hemoglobin in the blood. This shortage prevents the blood from carrying an adequate supply of oxygen to the bodys tissues, resulting in various symptoms of anemia including: tiredness fatigue, weakness, pale skin, and other similar complications. 