What condition is characterized by a lack of red blood cells?

The condition characterized by a lack of red blood cells is anemia. This condition results when the number of red blood cells is insufficient to deliver adequate oxygen to the body's tissues. It can arise from various causes, including nutritional deficiencies (such as iron, folate, or vitamin B12), chronic diseases, bone marrow problems, or excessive blood loss. Symptoms of anemia may include fatigue, weakness, pale skin, and shortness of breath, depending on the severity of the red blood cell deficiency.

In contrast, leukemia is a type of cancer affecting white blood cells, leading to an overproduction of abnormal cells and is not directly related to the lack of red blood cells. Thrombocytopenia refers to a low platelet count, which affects blood clotting but does not indicate a deficiency in red blood cells. Hyperlipidemia pertains to elevated levels of lipids (fats) in the bloodstream, which is unrelated to red blood cell count.