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A pacifier is a plastic or rubber device for a baby to chew or suck on. Babies often need to suck for satisfaction rather than for

Parathyroid hormone is a substance that helps maintain the proper amount of calcium in the blood. Parathyroid hormone is produced

The parathyroid glands are several (usually four) tiny glands, located next to or behind the thyroid gland in the neck. They help

Paraphimosis is a condition in which the skin that normally covers the penis—the foreskin—is tight when it is pulled back and then

Paralysis is a loss of nerve function or muscle power resulting in an inability to move. When nerve cells in the brain or other

Paracentesis is a procedure in which a needle is inserted through the abdominal wall to remove fluid that has built up in the

A Pap test is a test that looks for changes in the cells of the cervix. During the test, your doctor collects a small sample of

A panic attack is a sudden feeling of extreme anxiety. Symptoms include feelings of dying or losing control of oneself, rapid

Pancreatitis is inflammation of the pancreas, an organ in your belly that makes insulin and enzymes that help you digest food

The pancreas is an organ in the upper abdomen, behind the stomach and close to the spine, that produces substances (digestive