{"entity":{"id":"oral-visual-screening","kind":"technology","name":"Oral cancer visual screening","aka":[],"tldr":"A trained health worker looking inside the mouth with a light can find mouth cancer early; in India this cut deaths by a third among people who use tobacco or alcohol.","summary":"The Kerala cluster-randomised trial (Trivandrum Oral Cancer Screening Study, Lancet 2005) randomised 13 clusters with 191,873 people to three rounds of visual oral examination by trained health workers or to usual care; among tobacco or alcohol users, oral cancer mortality was reduced by about a third (rate ratio 0.66), a benefit sustained at 15 years, with no statistically significant effect in people without those risk factors. It remains the only randomised evidence for any oral cancer screening and underpins India's national programme of opportunistic oral visual examination for people over 30 in the non-communicable disease clinics. The USPSTF (2013) found insufficient evidence for screening asymptomatic adults in the US, where incidence is lower and increasingly driven by HPV in the throat rather than tobacco in the mouth. Dentists' routine examination is the de facto screen in high-income countries.","status":"established","asOf":"2026-09-10","links":[{"label":"Kerala oral cancer screening trial (Lancet 2005)","url":"https://doi.org/10.1016/S0140-6736(05)66658-5"},{"label":"USPSTF oral cancer screening (2013)","url":"https://www.uspreventiveservicestaskforce.org/uspstf/recommendation/oral-cancer-screening"}],"tags":[],"related":[],"cancers":["head-and-neck"],"sections":["early-detection","prevention"],"technologies":[],"targets":[],"drugs":[],"companies":[],"institutions":[],"pathways":[],"terms":["screening"],"trials":[],"people":[],"bottlenecks":[],"keyPapers":[],"journals":[],"dependsOn":[],"notes":[],"principle":"Systematic inspection and palpation of the oral mucosa under good light for leukoplakia, erythroplakia, ulcers and masses, with referral for biopsy.","strengths":["No equipment, deliverable by community health workers","Randomised evidence of mortality reduction in high-risk users"],"limitations":["Benefit confined to tobacco and alcohol users","Compliance with referral for biopsy is the weak link","Does not address HPV-related oropharyngeal cancer"]},"route":"/technologies/oral-visual-screening/","neighbours":{"cancer":[{"id":"buccal-mucosa-cancer","kind":"cancer","name":"Buccal mucosa and gingivobuccal cancer (oral cancer in India)","route":"/cancers/buccal-mucosa-cancer/"},{"id":"head-and-neck","kind":"cancer","name":"Head and neck squamous cell carcinoma","route":"/cancers/head-and-neck/"},{"id":"oral-tongue-cancer","kind":"cancer","name":"Oral tongue and floor of mouth cancer","route":"/cancers/oral-tongue-cancer/"}],"section":[{"id":"early-detection","kind":"section","name":"Early Detection & Screening","route":"/fronts/early-detection/"},{"id":"prevention","kind":"section","name":"Prevention & Risk","route":"/fronts/prevention/"}],"term":[{"id":"screening","kind":"term","name":"Screening","route":"/terms/screening/"}],"trial":[{"id":"kerala-oral-screening","kind":"trial","name":"Kerala oral cancer visual screening trial (Trivandrum)","route":"/trials/kerala-oral-screening/"}],"roadmap":[{"id":"global-access-roadmap","kind":"roadmap","name":"Global access and affordability roadmap: essential medicines and generics → biosimilars and frugal trials → reliance, pooling and homegrown innovation","route":"/roadmaps/global-access-roadmap/"}],"technology":[{"id":"via-cervical-screening","kind":"technology","name":"Visual inspection with acetic acid (VIA) for cervical screening","route":"/technologies/via-cervical-screening/"}]}}