Most common site of squamous cell carcinoma:: (A) Floor of the mouth, (B) Tongue, (C) Buccal mucosa, (D) Lip
Answer is B. Lateral border of tongue is the most common site of squamous cell carcinoma.
Carcinoma of the tongue accounts for more than 50% of intraoral cancers in the United States. Two-thirds of lingual carcinomas appear as painless, indurated masses or ulcers of the posterior lateral border; 20% occur on anterior lateral or ventral surfaces, and only 4% occur on the dorsum. For unknown reasons, the oral tongue represents an increasingly common site of involvement in young patients.