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Aortic valve regurgitation is when a person's aortic valve leaks. The aortic valve is 1 of the heart's 4 valves. These valves help the blood flow through the heart and out to the body. Normally, the aortic valve stops blood from flowing back into the left ventricle. With aortic valve regurgitation, some blood leaks back through the valve as the heart relaxes.

Pemphigus is a rare group of autoimmune diseases. It causes blisters on the skin and mucous membranes throughout the body. Pemphigus vulgaris is the most common type of pemphigus.

Ulcers are open skin sores. Venous ulcers are leg ulcers caused by problems with blood flow in your leg veins.

Hyperbaric oxygen therapy, or HBOT, is a type of treatment used to speed up healing of carbon monoxide poisoning, gangrene, stubborn wounds, and infections in which tissues are starved for oxygen.

Wolff-Parkinson-White syndrome (WPW) is a type of abnormal heartbeat. If you have WPW, you may have episodes of tachycardia, when your heart beats very rapidly

Melanoma is a serious kind of skin cancer. This cancer involves cells called melanocytes. You also have melanocytes in your eyes. When these cells become cancerous, the condition is called intraocular melanoma. Learn about causes, risk factors, symptoms, and treatment.

Detailed information on adolescent medicine, including growth and development, cognitive development, relationship development, health and injury problems, and safety

Detailed information on adolescent medicine, including growth and development, cognitive development, relationship development, health and injury problems, and safety

Detailed information on adolescence, ages 13 to 18 years