Oral cancer, also known as mouth cancer or oral cavity cancer, refers to the uncontrolled growth of abnormal cells in the tissues of the oral cavity, which includes the lips, tongue, cheeks, floor of the mouth, hard and soft palate, and throat. It is a type of head and neck cancer. If oral cancer is suspected, a thorough examination of the mouth and throat is performed by a healthcare professional, which may include a physical examination, biopsy, and imaging tests such as X-rays, CT scans, or MRI scans.