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Thyroid cancer starts in the cells of the thyroid gland. The thyroid gland helps control hormones in your body and is part of the endocrine system. Learn more about symptoms, diagnosis, and treatments.

Radiation uses high doses of radiation to kill cancer cells or keep them from multiplying. Learn when it may be used, how it's delivered, what types there are, and more.

To find out the cause of your sleep problems, you may need many tests. These may confirm or rule out various health conditions and other problems.

Ascites is a condition that occurs when fluid collects in spaces in your belly. It can be painful and keep you from moving around comfortably. Ascites can set the stage for an infection in your belly. Fluid may also move into your chest and surround your lungs. This makes it hard to breathe.

Your doctor can't give you the best care if you don't say what's really going on. This true-false quiz will help you prepare for your next visit.

Vaginal cancer starts in the cells of your vagina, also known as the birth canal. The most common type of vaginal cancer develops over many years.

Learn about the risk factors for penile cancer and how you can reduce your risk.

The symptoms of gallbladder cancer usually don't occur until the tumor is big or the cancer has spread. Learn about the symptoms of this type of cancer.

This test checks newborns for PKU, a condition that can cause brain damage and severe intellectual disability if not treated.