This high-yield revision note on Premalignant Oral Lesions: Leukoplakia, Erythroplakia & OSMF covers everything examiners typically test under Oral Pathology — structured as quick-reference tables, clinical correlations, mnemonics and previous-year-style high-yield points. It's built for last-mile revision before NEET MDS, INI-CET MDS and INBDE, so you can scan it in minutes instead of re-reading a whole textbook chapter.
| Lesion/Condition | Definition | Malignant Transformation Rate | Key Point |
|---|---|---|---|
| Leukoplakia | White patch/plaque that cannot be characterized as any other disease and cannot be scraped off | ~1-20% (average 3-6%), higher in non-homogenous/verrucous/proliferative types | MOST COMMON premalignant lesion; biopsy needed to grade dysplasia |
| Erythroplakia | Red, velvety patch that cannot be characterized clinically/pathologically as any other condition | Highest of all - up to 14-50% | Highest-risk single oral premalignant lesion; always biopsy |
| Oral submucous fibrosis (OSMF) | Chronic, progressive, scarring/fibrotic disease of oral mucosa - strongly linked to areca nut chewing | ~7-13% | Premalignant CONDITION (not a lesion); juxtaepithelial fibrosis, blanching, progressive trismus, burning sensation |
| Actinic cheilitis (cheilosis) | Chronic sun damage of lower lip vermilion | Can progress to lip SCC | Also called "sailor's/farmer's lip" |
| Oral lichen planus (erosive type) | Chronic mucocutaneous immunologic condition | Low but recognized (~1%), mainly erosive/atrophic forms | Bilateral, symmetric, Wickham's striae |
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