Areas of carcinoma of oral mucosa can be identified by staining with:: (A) 1% zinc chloride, (B) 2% silver nitrate, (C) Gentian violet, (D) 2% toluidine blue
Answer is D. Toluidine Blue Toluidine blue is a basic metachromatic dye with high affinity for acidic tissue components, thereby staining tissues rich in DNA and RNAQ. Wide applications both as vital staining in living tissues and as a special stain used in vivo to identify dysplasia and carcinoma of the oral cavityQ.