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Pheochromocytoma is a tumor of the adrenal glands. The tumor makes hormones called epinephrine and norepinephrine. This leads to an excess of the hormones in the body. These hormones help manage heart rate and blood pressure, and they have other tasks. Too much of these hormones in the body causes problems.

Read on for details about stomach and duodenal ulcers in children. Learn about causes, risk factors, symptoms, diagnosis, and treatment.

Patent ductus arteriosus (PDA) is a heart defect found in the days or weeks after birth. Read on to learn about symptoms, diagnosis, and treatment options.

It seems everyone has an opinion about pacifiers. That's because there are both advantages and disadvantages to using them. Get the full facts so you can make the right choice for your baby.

This test measures the amount of a protein called factor I, or fibrinogen, in your blood. It helps find out if you have a bleeding or clotting disorder.

This test measures the concentration of dissolved particles, or osmolality, in your blood.

This blood test checks the level of phosphorus in your body.

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

This test looks for platelet antibodies in your blood to find out the cause of a low platelet count.