Hematology

Neutrophil Hypersegmentation: Diagnostic Criteria

Laboratory criteria for neutrophil hypersegmentation in a complete blood count: hereditary forms, megaloblastic anemia, and the impact of cytostatic therapy.

🔬 Neutrophil hypersegmentation.

Hypersegmentation is defined as the presence of any number of neutrophils with more than 5 nuclear segments or more than 3% of neutrophils having 5 segments (when examining 100 neutrophils). Hereditary and acquired forms of neutrophil hypersegmentation are distinguished.

Hereditary forms are inherited in an autosomal dominant manner; neutrophil function is not impaired in these cases.

Acquired forms are observed during treatment with cytostatics and prednisolone; they are also characteristic of patients with megaloblastic anemia.

🙏 Photos and description kindly provided by biologist Anna Feditskaya, Luhansk.