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Kidney Aspiration Cytology (Guided by Imaging) with Specimen Evaluation

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

This test involves collecting and examining cells from your kidney using imaging guidance to check for abnormalities such as tumors, cysts, or signs of infection.

Quick summary

["A guided kidney aspiration helps diagnose kidney-related conditions by analyzing cells directly from the affected area."]

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

Key facts at a glance

LOINC
92923-2
Short code
CT Guided Kidney Asp
Synonyms
CT Guided Kidney Asp
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ct
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 This Test Is Done

Your healthcare provider may recommend this test if you have symptoms like persistent kidney pain, unexplained weight loss, or signs of a mass in your kidney. It’s also used when imaging studies (like ultrasounds or CT scans) suggest a suspicious lesion that needs further evaluation.

What to Expect Before the Test

You’ll likely receive local anesthesia to numb the area, and a needle guided by imaging (such as ultrasound or CT) will be used to collect cells. The procedure is usually quick and may involve a short recovery period.

During the Test

Once the needle reaches the kidney, fluid or cells are collected. The sample is then sent to a lab for microscopic examination to identify abnormal cells or other findings.

After the Test

You may experience mild discomfort or bruising at the injection site. Follow-up care depends on the results—your provider will discuss next steps if abnormalities are found.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Frequently asked questions

How long does it take to get results from this test?
Results typically take 1–3 business days, depending on lab processing and microscopic review. Your provider will contact you once they’re ready.
Is this test painful?
You may feel some discomfort during the procedure, but local anesthesia minimizes pain. Most people describe it as similar to a minor needle prick, with possible mild soreness afterward.
Can I eat or drink before this test?
No fasting is required for this test. However, follow any specific instructions your provider gives, such as avoiding certain medications or supplements, if applicable.
  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