Rare diseases · Sign or symptom

Abnormal granulocyte count

HP:0032309

What it means

Abnormal increase or decrease of absolute number of granulocytes in the blood, per microliter, compared to a reference range for a given sex and age-group.

Granulocytes belong to the innate immune system and make up the largest proportion of white blood cells. They are myeloid cells and can be classified as neutrophil granulocytes (neutrophils), eosinophils, basophils, monocytes, and mast cells.

Part of the broader category

Abnormal granulocyte count

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This page uses the Human Phenotype Ontology (2026-06-23) — Human Phenotype Ontology Consortium, hpo.jax.org. Disease associations from Orphanet (INSERM), CC BY 4.0. Content is educational and is not medical advice.