CELLS, TISSUE AND INFECTION
Cytology
Microscopic examination of individual cells collected from a lump, skin, ear, fluid or another site.
THE SHORT VERSION
Testing helps answer a clinical question.
Cytology evaluates individual cells or small groups of cells. Samples may come from a fine-needle aspirate, skin impression, ear swab, fluid or another veterinary-selected collection technique.
What is this test?
Cytology evaluates individual cells or small groups of cells. Samples may come from a fine-needle aspirate, skin impression, ear swab, fluid or another veterinary-selected collection technique.
What information can it provide?
- A fine-needle aspirate collects cells from selected lumps or organs using a small needle.
- Skin and ear cytology can look for inflammation, yeast, bacteria or other cellular patterns.
- Fluid analysis may help characterize inflammation or abnormal cell populations.
- A veterinary pathologist may review slides when interpretation requires specialist expertise.
When might your veterinarian recommend it?
- Investigate a new lump, chronic ear problem, itchy skin or unexplained swelling.
- Help distinguish selected inflammatory, infectious and cellular processes.
- Guide the decision about treatment, culture, biopsy or referral.
What can owners do before the visit?
- Ask whether clipping, topical medication avoidance or sedation is needed for the specific sample.
- Tell the veterinary team if an ear or skin product has recently been used.
- Do not squeeze, lance or repeatedly manipulate a lump at home.
What can this test not tell you by itself?
- A sample may contain too few cells or may not represent the entire lesion.
- Cytology cannot always distinguish every benign and malignant process.
- A tissue biopsy can provide additional architecture when cytology is inconclusive.
Do not change medication, interpret an abnormal number as a diagnosis or delay urgent treatment without direction from your veterinary team.
Useful questions for your appointment
- What type of sample is being collected and who will interpret it?
- Could prior medication alter an ear or skin sample?
- When would biopsy or culture be more informative?