All are precancerous lesions of oral cavity except
Premalignant Lesions - Leukoplakia Erythroplakia Oral submucous fibrosis Melanosis and mucosal hyperpigmentation Ref: Dhingra; Textbook of Ear, Nose and Throat; 7th Edition; Page 253
Leukoplakia
Erythroplakia
Diffuse oral submucous fibrosis
Diffuse aphthous ulcers
Oral cavity & Oesophagus