What is the expected MCV level in macrocytic anemia?

In macrocytic anemia, the mean corpuscular volume (MCV) is elevated due to the presence of larger-than-normal red blood cells, a key characteristic of this type of anemia. The expected MCV level in macrocytic anemia typically ranges from approximately 100 to 115 femtoliters. This increase in MCV is often a result of factors such as vitamin B12 deficiency or folate deficiency, which impede normal red blood cell production and maturation.

As these larger cells develop, the overall MCV reflects this increase in size, thereby confirming the diagnosis of macrocytic anemia. Understanding the MCV parameters helps clinicians to distinguish macrocytic anemia from other types of anemias, such as microcytic or normocytic anemia, which would present with different MCV levels. Hence, the correct answer falls within the 100-115 range, aligning with the expected findings for macrocytic anemia.