Mean Corpuscular Volume (MCV) is used to classify anemia into which categories?

Mean Corpuscular Volume (MCV) is used to classify anemia into which categories?

• A. Microcytic, macrocytic, or normocytic.
• B. Hypocellular and hypercellular.
• C. Hyperglycemic and normoglycemic.
• D. Hyperkalemic and hypokalemic.

Answer: (A)

Mean corpuscular volume measures the average size of red blood cells. This size classification splits anemia into microcytic (smaller than normal), normocytic (normal size), and macrocytic (larger than normal). The normal range is roughly 80–100 femtoliters. When the MCV is low, red cells are small, which points toward iron deficiency or thalassemia. When the MCV is high, red cells are large, as seen with B12 or folate deficiency, liver disease, or alcoholism. If the MCV is normal despite anemia, it suggests a process with normal cell size but reduced cell number, such as acute blood loss or anemia of chronic disease. This size-based grouping helps guide the subsequent diagnostic workup and targeted tests.

Mean corpuscular volume measures the average size of red blood cells. This size classification splits anemia into microcytic (smaller than normal), normocytic (normal size), and macrocytic (larger than normal). The normal range is roughly 80–100 femtoliters. When the MCV is low, red cells are small, which points toward iron deficiency or thalassemia. When the MCV is high, red cells are large, as seen with B12 or folate deficiency, liver disease, or alcoholism. If the MCV is normal despite anemia, it suggests a process with normal cell size but reduced cell number, such as acute blood loss or anemia of chronic disease. This size-based grouping helps guide the subsequent diagnostic workup and targeted tests.