In-depth

Atrioventricular canal defect

Atrioventricular canal defect is a congenital heart defect involving a hole in the center of the heart and abnormal valves between the heart's chambers.

Autonomic neuropathy

Autonomic neuropathy refers to damage to or disease affecting the involuntary nerves.Autonomic neuropathy refers to damage to or disease affecting the involuntary nerves.

Coarctation of the aorta

Coarctation of the aorta is a cardiovascular defect resulting in a narrowing of the aorta, the blood vessel that delivers oxygen-rich blood to your body.

Epidermolysis bullosa

Epidermolysis bullosa is a group of inherited skin diseases whose hallmark is fragile skin that blisters easily. Severe forms may be life-threatening.

Heart murmurs

This whooshing sound in your heart is usually harmless, but in some cases heart murmurs can alert your doctor to specific heart conditions.

Heat exhaustion

Heat exhaustion occurs when your body overheats, usually as a result of hot, humid weather. It's preventable, but can be dangerous if not treated.

Hidradenitis suppurativa

Hidradenitis suppurativa is a chronic and often painful skin disease. Early diagnosis and treatment offer hope for managing the symptoms.

Leukemia

Leukemia is a cancer in which abnormal white blood cells proliferate. Although it's often perceived as a children's disease, leukemia also occurs in adults.

Pituitary tumors

Pituitary tumors are abnormal growths in the pituitary gland in the brain. Most are noncancerous (benign). Some may cause overproduction of hormones and associated problems.

Porphyria

Porphyria is a group of inherited disorders that result from buildup of natural chemicals call porphyrins, which can cause nervous system and skin problems.

Pulmonary edema

Pulmonary edema occurs when air sacs in the lungs fill with fluid. It's often a life-threatening emergency.

Serotonin syndrome

Serotonin syndrome — caused by mixing some antidepressants and other medications — can be life-threatening if left untreated.

Sep. 21, 2012