Erythroplakia — ORE Part 1 MCQ
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Correct answer: B — Erythroplakia
Erythroplakia is defined as a red patch or plaque of the oral mucosa that cannot be clinically or pathologically scrubbed away or diagnosed as any other disease. The classic clinical presentation is a sharply demarcated, bright red, velvety or granular patch. The soft palate is the most common site (77% of cases). Although this patient lacks the typical smoking and alcohol history (seen in 100% and 46% of reported cases respectively), erythroplakia can occur without these exposures. The critical discriminator is the clinical morphology and site: red velvety appearance at the soft palate is pathognomonic for erythroplakia among the options. B (oral lichen planus) presents with reticular white patterns and atrophic areas, not uniform red velvety mucosa. C (denture stomatitis) requires denture contact and presents differently. D (median rhomboid glossitis) is a specific midline dorsal tongue lesion. E (geographic tongue) has migratory mapped areas of depapillation on the tongue dorsum. Erythroplakia demands urgent biopsy because over 90% of cases show dysplasia, carcinoma in situ, or invasive carcinoma on first presentation, making it the highest-risk oral precancerous lesion.
Reference: Oliveira MCN, Meneghim MC, Netto DCS, et al. Oral erythroplakia and speckled leukoplakia: retrospective analysis of 13 cases. J Contemp Dent Pract. 2009;10(4):E073-E079. PMID: 19575119. Available at: https://pubmed.ncbi.nlm.nih.gov/19575119/; complemented by WHO definition and UK Royal Marsden NHS Cancer Centre guidance (https://www.royalmarsden.nhs.uk/private-care/news-and-blogs/key-signs-mouth-cancer-look-out).