Which term describes the presence of an increased area of central pallor in RBCs?

• A. Macrocytic
• B. Hypochromatic
• C. Microcytic
• D. Anisocytotic

Answer: (B)

The presence of an increased area of central pallor in red blood cells (RBCs) is best described by the term hypochromatic. This condition is characterized by RBCs that have less hemoglobin than normal, resulting in a lighter staining and a larger central area that appears pale or colorless. Hypochromasia is often indicative of conditions such as iron deficiency anemia, where there is insufficient iron available to produce an adequate amount of hemoglobin, leading to a reduced concentration within the cells.

In contrast, macrocytic refers to larger-than-normal RBCs, microcytic pertains to smaller-than-normal RBCs, and anisocytotic describes variations in cell size. These terms relate to different aspects of RBC morphology and do not specifically denote the presence of an increased area of central pallor as hypochromatic does. Understanding the significance of hypochromasia can help in diagnosing specific anemias and understanding their underlying causes.