Immature Granulocytes

The count of immature white cells, which can signal infection or marrow stress.

Last reviewedJune 16, 2026

Whole blood

sample type

~3 mL

blood needed

~7 days

results in app

Any time of day

best timing

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Why test Reference ranges What you'll learn What affects it How testing works Sources FAQ

In short

Immature granulocytes are young, not yet fully developed white blood cells of the neutrophil family, such as metamyelocytes, myelocytes and promyelocytes. They normally stay in the bone marrow until they mature, so very few appear in the blood of a healthy person.

Modern haematology analysers count them automatically as part of the complete blood count differential. The absolute count tells you how many of these young cells are circulating per litre of blood.

Blood Health (CBC & Iron)

Reviewed against DGKL reference practice.

Why test this?

A small rise in immature granulocytes is one of the earliest signs that the bone marrow is releasing extra white cells, usually in response to infection or inflammation. It can flag a developing problem before other markers move.

Higher counts are seen with bacterial infections, sepsis, tissue injury, and after surgery. Persistently raised values can sometimes point to a bone marrow disorder and are interpreted alongside the rest of the blood count.

What is a normal result?

Aniva reads your result against research-backed ranges, not just the lab's wide normal. The reference shown below is specific to this biomarker.

Typical adult guidance, analyser dependent:

Result	Range
Immature granulocytes (absolute)	0.00 to 0.03 x10⁹/L

Values near zero are normal. Ranges vary by analyser and laboratory, so always read your result against your lab's reference interval.

Ranges are guidance and vary by lab and assay, aligned with DGKL practice. Always read your result against your own lab's reference interval.

What insights will this test give you?

Whether your body is mounting an active response to infection or inflammation.
An early signal that can appear before the total white cell count rises.
Context for the rest of your white cell differential.

What can affect this result?

What can skew the result

Counts can be slightly raised in pregnancy and after surgery without disease. Clotted or old samples and very low numbers of these cells make the automated count less precise. Results should be confirmed on a blood film if persistently high.

Best interpreted with

Read alongside the total white cell count, neutrophils, and C-reactive protein when looking for infection or inflammation.

How is this tested?

Sample

Whole blood

Blood needed

~3 mL

Method

Flow cytometry

Best timing

Any time of day

Sources. The evidence behind this

LOINC 53115-2: Immature granulocytes [#/volume] in Blood by Automated count

Immature granulocyte count as a marker of infection and inflammation (review)

Mayo Clinic Laboratories: Complete Blood Count with Differential

Common questions

Which Aniva panels include this marker?

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