How is anemia defined?

Anemia is defined as a deficiency of red blood cells (RBC) or hemoglobin in the blood. This condition results in a decreased ability of the blood to carry oxygen to the body's tissues, which can lead to symptoms such as fatigue, weakness, and shortness of breath. In clinical terms, anemia is often diagnosed based on specific measurements of hemoglobin levels and hematocrit, which are indicative of the blood's oxygen-carrying capacity.

A fundamental understanding of anemia is crucial in oncology, especially given that many cancer treatments can lead to a reduction in red blood cell production or increase hemolysis, thereby exacerbating the condition. Recognizing anemia as the deficiency of RBCs or hemoglobin helps guide the assessment and management strategies for patients undergoing chemotherapy or other treatments.