The most common site for squamous cell carcinoma in oral cavity is
Tongue
Floor of mouth
Upper and lower alveolus
Buccal mucosa
Site distribution showed that the most common location of the tumors was 1. Border of the tongue (37%) 2. Alveolarmucosaand gingiva (20%) and 3. Floor of the mouth and ventral tongue (19%). Carcinoma tongue - Carcinoma involving anterior two-thirds of the tongue is commonly seen in men in the age group of 50-70 years. It may also occur in the younger age group and in females. It may also develop on a pre-existing leukoplakia, long-standing dental ulcer or syphilitic glossitis. The vast majority are squamous cell type. Site: Most common site is middle of the lateral border or the ventral aspect of the tongue. Uncommonly, the tip or the dorsum may be involved. (Ref: Textbook of diseases of ENT, PL Dhingra, 7th edition, pg no. 255)
Oral cavity & Oesophagus