Which of the following blood findings can accompany copper deficiency?

• A. Leukocytosis
• B. Leukopenia
• C. Thrombocytosis
• D. Erythrocytosis

Answer: (B)

Copper deficiency can disrupt white blood cell production. Copper is essential for enzymes that support hematopoiesis and iron metabolism; without it, white blood cell development is impaired, particularly neutrophils, leading to leukopenia. This deficiency can also affect iron utilization, contributing to anemia, but the leukopenia is the lab finding most likely to accompany copper deficiency. Other patterns like leukocytosis, thrombocytosis, or erythrocytosis are not typical in this context.