Trillions of bacteria - that's right trillions with a "t" - are found inside the lining of the colon. When inflammation enters the picture, that's when trouble can start. The bacteria and inflammation can team up and become a deadly duo.

The need for radiation treatment after a lumpectomy has been studied for years. Current treatment guidelines say radiation is not necessary for older women with early breast cancer. A new study suggests that this may not be the case.

The most common cancer in young men affects the testis. These are called germ cell tumors or GCTs. The guidelines for treating advanced (cancer that has spread or metastasized) cases have recently been studied.

So little is understood about the effects of chemotherapy on a developing baby that doctors are still learning about how safe treatment is during pregnancy.

Many head and neck cancers, including nasal, can't be operated on because of where they are located. Some are too close to the brain. That's why radiation therapy is often used to treat these cancers.

When breast cancer spreads to the bones, various drugs are available to control the disease. This class of drugs is called biophosphonates . A manufacturer-funded study suggests its drug is better than others.

The lowly aspirin is climbing to new heights of respect in the medical world. Its daily use is associated with a lower risk of heart disease. Cancer also seems to stay clear of this common medicine once dubbed a "miracle drug."

The gallbladder is a part of what's called the biliary tract, which is the system that makes and distributes bile to aid in digestion. Cancer of the biliary tract is also known as cholangiocarcinoma. 

Testicular cancer usually strikes young men in their 20s and 30s . It's the most common cancer in this age group and also the most curable. Researchers wanted to know how the cancer and its treatment affect sexual function.

Maybe you've heard about leptin as it relates to weight control. Leptin is a hormone that the body's fat cells produce, and scientists believe it may play a role in cancer. Is this true for uterine (also known as endometrial) cancer?