This book examines the causes, diagnoses and treatment of oral cancer. Topics discussed include the role of MRI and DCE-MRI in the differential diagnosis of squamous cell carcinomas, salivary gland tumours and malignant lymphoma; radiotherapy for oral cancer; chewing tobacco and oral cancer; tumour suppressor gene detection in oral tumours for new therapeutic strategy; innate immunity and oral carcinogenesis and salivary metabolomics for oral cancer detection.