A brain tumor starts when cells in the brain change and grow out of control. As they continue to grow, they form a mass of cells that becomes a tumor. Learn about the types of brain tumors and symptoms.

An olfactory neuroblastoma often happens on the roof of the nasal cavity. It involves the cribriform plate, which is a bone between the eyes and located deep in the skull.

Rathke cleft cysts are noncancerous fluid-filled growths that develop between the parts of the pituitary gland at the base of the brain while a baby is growing in the uterus. This cyst develops from a piece of the fetus' developing Rathke pouch, which ultimately becomes part of the pituitary gland.

Back pain is common in pregnancy because of your changing body. Here are ideas on what you can do to cope.

A pancreatic neuroendocrine tumor is a type of cancer that forms tumors in the pancreas.

Learn about the causes, symptoms, diagnosis, and treatment for ampullary cancer.

How did the COVID-19 vaccines happen so quickly? It turns out that a global pandemic can rally resources very quickly in many countries. This made a lot happen in less time.

A clinical cardiac electrophysiologist, or cardiac EP, is a health care provider who treats rhythm problems of the heart. Learn more about their medical training, and the tests and procedures that they do.

An AED is a small, portable, battery-powered machine with a computer in it. The machine detects heart activity. It can give an electric shock to someone if needed.

Ventricular fibrillation is a type of arrhythmia, or irregular heartbeat, that affects your heart's ventricles.