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CT Scan of the Parotid Gland With Intravenous Contrast

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

A CT scan uses intravenous contrast to create detailed images of the parotid glands, helping evaluate swelling, masses, inflammation, and nearby lymph nodes.

Quick summary

["This imaging test can help identify the cause and extent of parotid gland swelling or a suspected mass."]

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

Key facts at a glance

LOINC
37240-9
Short code
CT Parotid gland W contr IV
Synonyms
CT Parotid gland W contr IV
Category
liver
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

What is this test?

This is a computed tomography (CT) scan of the parotid glands, the major salivary glands near the ears and jaw. Intravenous contrast is injected to improve the visibility of glands, masses, inflammation, blood vessels, and nearby lymph nodes.

Why might I need this test?

The test may be recommended for persistent swelling, tenderness, a lump near the ear or jaw, facial nerve symptoms, or unclear findings on an examination or ultrasound. It can also help evaluate whether a condition involves only the parotid gland or nearby tissues.

How is the test performed?

You will lie on a CT table while an X-ray machine takes several images. A contrast material is usually injected into a vein in your arm, and the scan may include images before and after the injection.

How do I prepare for the test?

Follow the imaging center's instructions about eating, drinking, and medications. Tell the care team if you have kidney disease, are pregnant or may be pregnant, or have had a previous reaction to iodinated contrast; additional screening or precautions may be needed.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Abnormal findings may indicate inflammation, infection, a salivary duct stone, enlargement, a cyst, or a mass in or around the parotid gland. Enlarged nearby lymph nodes may also be seen. A radiologist will interpret the images in the context of your symptoms and other tests, and further evaluation may be needed.

Short name

CT parotid gland with IV contrast

Frequently asked questions

Does this test use radiation?
Yes. CT scans use a small amount of ionizing radiation, with the amount depending on the body area and examination.
What is intravenous contrast?
It is an iodine-based material injected into a vein to make certain tissues and structures easier to see on CT images.
Can this test determine whether a lump is cancer?
Not by itself. The scan can show the size, location, and features of a mass, but a biopsy or other evaluation may be needed to determine its cause.
  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