Hematology
Basophils
The rarest of the white cell fractions, involved in allergic and inflammatory responses.
Unit %Typical adult range 0–2 %
What it is
The rarest of the white cell fractions, involved in allergic and inflammatory responses.
Why it matters
It is reported for completeness more than for interpretation; the differential has to add to a hundred.
Reading the number
Normally close to zero, and at that level the analyser is counting a handful of cells, so the value is mostly rounding. A single high result is almost always a counting artefact.
What moves it
allergic reactionsrecent infectioncounting error at very low numbers
Read alongside
When to raise it
Worth mentioning only if it is repeatedly and clearly raised.
Also known as
On a report in another language.
A lab report names this analyte in its own language. Vitals Vault recognises each of these and files them all under Basophils.
BasófilosBasofiilidBasophile
Catalog entry last updated 2026-08-27. Browse all 165 metrics.