What you can expect By Mayo Clinic Staff Print During an oral cancer screening exam, your dentist looks over the inside of your mouth to check for red or white patches or mouth sores. Using gloved hands, your dentist also feels the tissues in your mouth to check for lumps or other abnormalities. The dentist may also examine your throat and neck for lumps. Additional testsSome dentists use special tests in addition to the oral exam to screen for oral cancer. It's not clear if these tests offer any additional benefit over the oral exam. Special tests may involve: Oral cancer screening dye. Rinsing your mouth with a special blue dye before an exam. Abnormal cells in your mouth may take up the dye and appear blue. Oral cancer screening light. Shining a light in your mouth during an exam. The light makes healthy tissue appear dark and makes abnormal tissue appear white. Request an appointment Doctors & Departments Nov. 15, 2023 Print Show references Lingen MW, et al. Evidence-based clinical practice guideline for the evaluation of potentially malignant disorders in the oral cavity. Journal of the American Dental Association. 2018; doi:10.1016/j.adaj.2017.07.032. Stefanac SJ, et al., eds. Patient evaluation and assessment. In: Diagnosis and Treatment Planning in Dentistry. 3rd ed. Elsevier; 2017. https://www.clinicalkey.com. Accessed Aug. 14, 2019. Moyer VA. Screening for oral cancer: U.S. Preventive Services Task Force recommendation statement. Annals of Internal Medicine. 2014; doi:10.7326/M13-2568. Oral cavity, pharyngeal and laryngeal cancer screening (PDQ) – Health professional version. National Cancer Institute. https://www.cancer.gov/types/head-and-neck/hp/oral-screening-pdq. Accessed Aug. 14, 2019. Cancer Facts & Figures 2019. American Cancer Society. https://www.cancer.org/research/cancer-facts-statistics/all-cancer-facts-figures/cancer-facts-figures-2019.html. Accessed Oct. 14, 2019. Salinas TJ (expert opinion). Mayo Clinic. Oct. 13, 2019. Oral cancer screeningAboutDoctors&Departments Advertisement Mayo Clinic does not endorse companies or products. Advertising revenue supports our not-for-profit mission. Advertising & Sponsorship Policy Opportunities Ad Choices Mayo Clinic Press Check out these best-sellers and special offers on books and newsletters from Mayo Clinic Press. Mayo Clinic on Incontinence - Mayo Clinic PressMayo Clinic on IncontinenceThe Essential Diabetes Book - Mayo Clinic PressThe Essential Diabetes BookMayo Clinic on Hearing and Balance - Mayo Clinic PressMayo Clinic on Hearing and BalanceFREE Mayo Clinic Diet Assessment - Mayo Clinic PressFREE Mayo Clinic Diet AssessmentMayo Clinic Health Letter - FREE book - Mayo Clinic PressMayo Clinic Health Letter - FREE book PRC-20394789 Patient Care & Health Information Tests & Procedures Oral cancer screening