Researchers are uncovering a surprising connection between periodontal disease (gum disease) and breast cancer, raising important questions about how oral health may influence diseases beyond the mouth.

What Did Scientists Discover?

A well-known oral bacterium, long associated with periodontitis, has been detected inside breast cancer tissue.

According to recent findings, this bacterium may travel from the oral cavity to the breast — likely spreading through the bloodstream or through mammary ducts.

Once inside breast tissue, it does not remain passive.
Laboratory evidence suggests it can adapt to the tumor environment and persist within cancer cells.

Even more concerning, research indicates that this gum disease–associated bacterium may accelerate tumor growth and progression by interacting with cancer cells and the immune system.

Does Gum Disease Cause Breast Cancer?

No.
There is currently no evidence that periodontal disease directly causes breast cancer.

However, the study highlights a potential biological link that deserves serious attention and further research.

Why This Matters

Oral health is not isolated from overall health.

Chronic gum inflammation may contribute to systemic inflammation — a known factor in many chronic diseases.

Preventing and treating periodontal disease is not just about saving teeth.
It may also play a role in protecting long-term systemic health.

Protect Your Health — Starting with Your Smile

At Ledismile Dental Clinic, we emphasize early diagnosis and advanced periodontal treatment to safeguard both oral and overall wellbeing.

📍 Book your periodontal evaluation today.
Your health begins in your mouth.

Source:
Parida S, Nandi D, Verma D, et al.
A pro-carcinogenic oral microbe internalized by breast cancer cells promotes mammary tumorigenesis.
Cell Communication and Signaling. 2026.
DOI: 10.1186/s12964-025-02635-9.