A. Folate or vitamin B12 deficiency
B. Iron deficiency
C. Thalassemia
D. Repeated blood transfusion
The correct answer is: A. Folate or vitamin B12 deficiency.
Nucleus of neutrophils normally contains up to four segments. Excessive segmentation (>5
nuclear lobes) is seen in folate or vitamin B12 deficiency & congenital neutropenia syndrome of
warts, hypogammaglobulinemia, infections & myelokathexis (WHIM).
Ref: Harrison’s 18th Ed. 473