Cytology of Nasopharyngeal Fluid (for Cancer Screening or Diagnostic Evaluation)
This test examines cells collected from your nasopharynx—a region near your throat—to check for abnormal growths, infections, or signs of cancer.
["Helps detect early signs of conditions like cancer or infections in the throat area."]
Key facts at a glance
- LOINC
- 24835-1
- Short code
- CT Nasopharynx+Neck
- Synonyms
- CT Nasopharynx+Neck
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 3.5
- Ref high
- 5
- Critical range
- 2.5 N/A – 6.5 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- ct
- CPT
- 84132
- SNOMED
- 110742001
- 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 Being Tested?
A small sample of cells is collected from your nasopharynx using a swab. These cells are then examined under a microscope to identify any abnormal patterns, such as cancerous cells, inflammatory changes, or viral/bacterial presence. The test may also assess the presence of specific biomarkers if cancer screening is indicated.
How Is the Sample Collected?
You’ll likely have a gentle swab inserted into your nose to collect cells from the nasopharynx. This is usually painless and takes only a few seconds. No special preparation is needed, but you may be asked to avoid eating or drinking for a short time before the procedure.
Why Might This Test Be Ordered?
Your healthcare provider may recommend this test if you have symptoms like persistent sore throat, unexplained weight loss, or a history of cancer in your family. It’s also used in screening for certain cancers, such as nasopharyngeal carcinoma, or to monitor conditions like infections or immune responses.
What Are Possible Results?
Results can vary widely. A normal test shows typical cells without signs of abnormalities. Abnormal results may indicate the need for further testing, such as a biopsy or additional imaging, to explore underlying causes like cancer, chronic infections, or other conditions.
Reference range
Adult: 3.5-5.0 mmol/LN/A
No special preparation required. Inform provider of any chest pain or symptoms.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance: This test plays a critical role in early cancer detection, particularly for cancers originating in the nasopharynx or nearby areas. It can also help diagnose infections, monitor treatment responses, or assess the spread of disease. Early identification of abnormalities improves treatment options and outcomes.
Short name
Nasopharyngeal Cytology
Frequently asked questions
What does a positive or abnormal result mean?
How often should I get this test?
Can I prepare for this test at home?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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