Is gum disease linked to cancer? A study published in the August issue of Cancer Epidemiology, Biomarkers & Prevention suggests a tie between the two, finding that older women with gum disease had a higher risk for cancers of the breast, lung, and esophagus as well as melanoma, the most dangerous form of skin cancer.
https://www.health.harvard.edu/womens-health/study-links-gum-disease-to-cancer-in-older-women
Study links gum disease to cancer in older women