If a number appears on this site, you should be able to find where it came from.
Quick answer
All incidence figures on this site come from GLOBOCAN 2022 (IARC/WHO) and its 2026 subsite analysis; clinical statements are checked against NCCN patient guidelines, NCI and ACS patient information, CDC/NIDCR HPV guidance and peer-reviewed regional studies. Each article lists the sources relevant to its own claims.
All sources used across the knowledge base
Global Cancer Observatory (GLOBOCAN 2022)International Agency for Research on Cancer / WHO · 2022 · Source of worldwide and country-level incidence and mortality estimates.
Smokeless Tobacco and Oral Cancer in Global PerspectiveNew England Journal of Medicine · 2026 · More than 360 million users of smokeless tobacco; ~120,000 oral cancer cases attributable to smokeless tobacco, areca nut or both in 2022.
HPV & Oropharyngeal CancerUS National Institute of Dental and Craniofacial Research · 2025 · About 70% of oropharyngeal cancers in the United States are HPV-positive.
Incidence and mortality: GLOBOCAN 2022 estimates, the American Cancer Society Global Cancer Facts & Figures tables, the 2026 CA subsite analysis and region-specific peer-reviewed studies (India oral cancer, South-East Asia NPC, laryngeal trends, thyroid cancer in Asia).
Clinical content: NCCN patient guidelines, NCI patient information and PDQ summaries, ACS patient guidance, NIDCR and CDC HPV information, and guideline-based summaries of work-up, treatment and follow-up.
Costs and logistics: explicitly labelled as illustrative planning ranges from clinical practice, not published prices. Only a written estimate issued after record review is treated as a quotation.
Dates: every page carries the same review date (8 November 2026). Statistics are tied to their data year, usually 2022, so a reader can tell whether a figure is current.
No fabricated statistics: where a figure is unavailable — for example a national ASR for a very rare tumour — the page says so rather than inventing one.
Corrections
If you find an error, an outdated figure or a broken citation, email eham@qq.com with the page URL and the source that supports the correction. Reviewed corrections are dated and applied across the affected pages, including llms-full.txt.