Medically reviewed by Marla Anderson, MD Key Takeaways Free radicals are unstable molecules that can damage DNA, leading to ...

Cancer is one of the most widely discussed health conditions in the world. It is not a single disease but a broad group of diseases ...

Medical researchers use knockout cells to study how genes function and how genes can be used for medical treatments. For example, a knockout cell line for liver cancer might turn off a gene linked ...

A new definition of rectal cancer in the Netherlands prompted reclassification of cancer as sigmoid tumors, which could lead to better treatment. Rectal and sigmoidal tumors have been hard to ...

Valarie Traynham shares what survivorship means to her, and how the definition has evolved after her diagnosis, during National Cancer Survivors Month. Survivorship can mean something different to ...