Which laboratory finding is most typical of macrocytosis seen in alcoholic liver disease?

Which laboratory finding is most typical of macrocytosis seen in alcoholic liver disease?

• A. Decreased MCV
• B. Macrocytosis
• C. Normal MCV
• D. Microcytosis

Answer: (B)

Macrocytosis, an increased mean corpuscular volume (MCV), is the lab pattern most typical with alcoholic liver disease. Chronic alcohol exposure directly affects the bone marrow and erythrocyte maturation, and folate deficiency is common in heavy drinkers. Both factors lead to larger red blood cells, so the MCV is often elevated (often >100 fL) even if anemia isn’t severe. Decreased MCV would point toward microcytosis from iron deficiency or thalassemia, while a normal MCV would not reflect the macrocytosis expected with alcohol-related marrow effects, and microcytosis would be the opposite pattern.

Macrocytosis, an increased mean corpuscular volume (MCV), is the lab pattern most typical with alcoholic liver disease. Chronic alcohol exposure directly affects the bone marrow and erythrocyte maturation, and folate deficiency is common in heavy drinkers. Both factors lead to larger red blood cells, so the MCV is often elevated (often >100 fL) even if anemia isn’t severe.

Decreased MCV would point toward microcytosis from iron deficiency or thalassemia, while a normal MCV would not reflect the macrocytosis expected with alcohol-related marrow effects, and microcytosis would be the opposite pattern.