Exfoliative Cytology
A non-invasive diagnostic technique in which surface cells are scraped from oral mucosa and examined microscopically to detect cellular abnormalities.
Full Definition
Exfoliative cytology involves collecting shed or mechanically dislodged cells from the mucosal surface using a wooden spatula, brush, or swab. The cells are smeared onto a glass slide, fixed, and stained—commonly with Papanicolaou (Pap) stain—before cytological assessment. In oral medicine, it serves as a preliminary screening tool for candidosis, viral infections (e.g., herpetic stomatitis), and potentially malignant lesions. Because it samples only superficial cells, it has limited sensitivity for subsurface dysplasia and should not replace incisional biopsy. Editors should note the correct spelling 'exfoliative' (not 'exfoliate cytology') and the preferred hyphenated compound 'brush-based exfoliative cytology' when specifying technique.
Usage
Usage note: Distinguish from 'fine-needle aspiration cytology', which samples deeper tissues. Do not abbreviate to 'cytology' alone without qualification in clinical documents.
In Context
- "Exfoliative cytology was performed to rule out herpetic aetiology before initiating antifungal therapy." — Oral medicine clinic note
- "The limitations of exfoliative cytology in detecting subsurface dysplasia were discussed in the methods section." — Research article