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Surbhi Singh: Hypersegmented Neutrophils – The Overachievers of the Myeloid World
Oct 28, 2025, 06:54

Surbhi Singh: Hypersegmented Neutrophils – The Overachievers of the Myeloid World

Surbhi Singh, Consultant Haematopathology at Agilus Diagnostics and Fortis Hospital Gurugram, shared a post on LinkedIn:

“Hypersegmented Neutrophils

Meet the overachievers of the myeloid world!
Neutrophils with ≥5 lobes, flagging a nuclear maturation defect — most classically in megaloblastic anemia (B12 or folate deficiency) when the nucleus keeps dividing but the cytoplasm doesn’t keep pace.

Clue: If more than 5% of neutrophils have 5 lobes or any one neutrophil has ≥6 — time to think B12/folate deficiency.

Other Causes of Hypersegmented Neutrophils

  • Myelodysplastic syndromes (MDS)
  • Chemotherapy / cytotoxic drugs (e.g., methotrexate, hydroxyurea)
  • DNA synthesis inhibitors (e.g., azathioprine, 5-FU)
  • Chronic infections / inflammation
  • Congenital neutrophil disorders (rare)
  • Uremia (occasionally)
  • Alcoholism / liver disease (nutritional + marrow toxicity factors).”

Surbhi Singh

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