Science
The science of cancer origins starts at the surface
Many of the world's most common cancers begin in epithelial tissue. These tissues cover the outside of the body and line organs and body cavities. They are involved in protection, absorption, secretion, and exchange. They are also the site of origin for carcinomas, the most common type of cancer.
Cancer Research UK describes carcinomas as cancers that start in epithelial tissues and notes that they include many breast, lung, bowel, and prostate cancers. SEER further states that carcinomas, malignancies of epithelial tissue, account for about 80 to 90 percent of all cancer cases.
Carcinomas
Carcinoma is not a niche disease category. It is the dominant architecture of cancer burden. From breast and lung to bowel, prostate, and many skin cancers, epithelial origin appears repeatedly across major cancer types.
That prevalence makes carcinoma an unusually powerful place to build scientific and technical infrastructure. A platform focused on epithelial origin has the potential to support a wide range of downstream oncology applications.
For Pathelium, this is not a background detail. It is the scientific basis for focusing on epithelial biology as a foundational layer in oncology.
80 to 90%
Roughly 80 to 90 percent of cancers are carcinomas, the class of cancers that begins in epithelial tissue.
What epithelium is
Epithelium is the protective cellular layer that covers the outside of the body and lines organs and body cavities.
It forms surfaces, ducts, and barriers. It helps regulate exchange, absorb stress, respond to injury, and maintain tissue order.
- Outer body surfaces
- Organ linings
- Body cavity linings
Why origin matters
Cancer is often discussed through the lens of tumors that are already visible. Pathelium is more interested in what comes before that.
If carcinomas begin in epithelial systems, then understanding epithelial state, stress, repair, and transformation becomes a serious path toward better oncology intelligence.
See how Pathelium applies this thesis
Epithelia AI is the platform built from Pathelium's epithelial-first view of cancer origins.