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Fine Needle Aspiration Cytology of the Spleen (Guided)

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

This test involves a small sample of cells taken from your spleen using a fine needle, guided by imaging (such as ultrasound or CT scan), to examine them under a microscope. It helps diagnose conditions like infections, tumors, or other abnormalities.

Quick summary

["A guided fine needle aspiration helps doctors analyze spleen tissue for potential health concerns with precision."]

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

Key facts at a glance

LOINC
30610-0
Short code
CT Guided Spleen FNA
Synonyms
CT Guided Spleen FNA
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
136
Ref high
145
Critical range
120 N/A – 160 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ct
CPT
84295
SNOMED
110741000
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why Is This Test Done?

Your doctor may recommend this test if you have symptoms like unexplained weight loss, fever, night sweats, or swelling in the spleen. It’s also used when there’s suspicion of a mass, lymphoma, or other spleen-related diseases, especially if other tests (like blood work) are inconclusive.

What to Expect Before the Test

You’ll likely receive local anesthesia to numb the area where the needle will be inserted. The procedure is usually quick and done while you’re awake. You may feel some discomfort but shouldn’t experience significant pain. Avoid eating or drinking for a few hours before the test if instructed.

During the Test

A healthcare provider will use imaging (like ultrasound or CT) to guide the needle into your spleen. A small amount of fluid or cells will be collected. The sample is then sent to a lab for microscopic examination to identify any abnormal cells or conditions.

After the Test

You can usually go home immediately after the procedure. Apply gentle pressure to the injection site to control any bleeding. Monitor for signs of infection (like increased pain, redness, or fever) and contact your doctor if you experience severe discomfort or unusual symptoms.

Reference range

Adult: 136-145 mmol/LN/A

Specimen: serum

No special preparation usually required. Stay well hydrated. Inform your healthcare provider of all medications and supplements you are taking.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Spleen FNA

Frequently asked questions

How long will it take to get results from this test?
Results typically take 1 to 3 business days, depending on the lab and complexity of the analysis. Your doctor will contact you once they’re ready to discuss findings.
Is this test painful?
You may feel some discomfort during the procedure, but it’s usually managed with local anesthesia. Most patients describe it as mild to moderate, similar to a small injection. Avoiding movement during the needle insertion helps minimize pain.
Can I eat or drink before this test?
Follow your doctor’s instructions, but generally, you may eat and drink normally unless they specify otherwise. Some tests require fasting, so confirm with your healthcare provider beforehand.
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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