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Interleukin-7 (IL-7) concentration

Published: August 9, 2026Updated: August 16, 2026

This test measures the amount of interleukin-7, a protein involved in immune cell development.

Quick summary

["IL-7 helps regulate white blood cell production and may be checked in certain immune-related conditions."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
70087-2
Short code
Il7 CSF-mCnc
Synonyms
Il7 CSF-mCnc
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

Why Might This Test Be Ordered?

Your healthcare provider may order an IL-7 test to evaluate immune function, assess conditions affecting white blood cell production, or monitor responses to treatments like chemotherapy or immune-modulating therapies. It could also be part of a broader evaluation for autoimmune diseases, infections, or blood disorders.

What Does This Test Involve?

A blood sample is drawn from a vein, typically in your arm. The sample is then processed to measure IL-7 levels using a specialized immunoassay method. Results are compared to reference ranges specific to the lab performing the test.

What Are Common Reasons for Testing?

IL-7 testing is less common than other blood tests but may be used in specialized cases, such as diagnosing or monitoring conditions like severe combined immunodeficiency (SCID), certain cancers affecting the bone marrow, or immune system disorders.

What Do Results Mean?

Interpretation of IL-7 results depends on clinical context and individual health. Elevated levels might suggest overactive immune signaling, while very low levels could indicate impaired immune development. Your healthcare provider will discuss these findings with you.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

IL-7 Level

Frequently asked questions

What does an abnormal IL-7 level mean?
An abnormal IL-7 level may indicate conditions affecting immune cell development, such as certain genetic disorders or cancers. However, results are always interpreted in the context of your overall health and medical history. Your doctor will explain what these findings mean for you.
How is IL-7 tested, and is it painful?
IL-7 testing involves a simple blood draw, similar to other blood tests. The process is generally quick and may cause mild discomfort, but it is not typically considered painful. The sample is processed in a lab to measure IL-7 concentration.
Can IL-7 levels change over time, and how often should I get tested?
IL-7 levels can fluctuate depending on health status, treatments, or immune activity. If ordered for monitoring, your healthcare provider will determine the appropriate frequency based on your specific situation. Follow their guidance for test timing and follow-up.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy