In-depth

Anaphylaxis

Anaphylaxis is the most serious type of allergic reaction. It often occurs rapidly after exposure to an allergen and may be life-threatening.

Ascariasis

Ascariasis is a common type of roundworm infection found worldwide. It's spread by poor hygiene and improper sanitation. Infections are effectively treated with medication.

Asthma

Asthma occurs when the main air passages of the lungs become inflamed, causing wheezing and difficulty breathing. Knowing warning signs can help you manage this chronic condition.

Asthma attack

Asthma attack: Find out what the symptoms are and how to treat an asthma attack.

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.

Bronchiolitis

Bronchiolitis is an infection of the lungs' airways that starts out like a cold but progresses to coughing and wheezing. It's common in infants.

Bronchitis

Bronchitis often develops after a cold. Learn how to prevent this potentially serious lung infection.

Carcinoid tumors

Carcinoid tumors are rare, slow-growing cancerous tumors that most often occur in the gastrointestinal tract or in the lungs.

Chronic cough

More than an annoyance, a chronic cough can significantly affect your quality of life. Find out how it's diagnosed and treated.

Cystic fibrosis

Earlier detection and better treatments have improved the outlook for people with cystic fibrosis.

Dilated cardiomyopathy

Dust mite allergy

Dust mite allergy, an immune system reaction to inhaled dust mite "debris," causes hay fever symptoms and may cause allergy-induced asthma.

Food allergy

Food allergy symptoms can make you miserable. Unfortunately, there's no cure — but there are steps you can take to keep your symptoms in check.

Heart failure

Heart failure means your heart can't efficiently pump blood throughout your body. Medications, and sometimes devices or surgery, can help you manage this condition.

Lung cancer

Smoking increases your risk of lung cancer. Quit now and reduce your risk.

Neuroblastoma

Neuroblastoma most commonly affects children age 5 and younger. It's the most common form of cancer in babies.

Peanut allergy

Peanut allergy can be serious. Find out what you need to know to prevent a life-threatening reaction.

Penicillin allergy

Penicillin allergy is the most common drug allergy. Find out what you can do to avoid potentially dangerous reactions.

Pulmonary embolism

Pulmonary embolism occurs when one or more arteries in your lungs become blocked. Surgery, cancer, family history and long airplane trips may place you at risk.

Sarcoidosis

Sarcoidosis starts in your lungs but can cause inflammation in any part of your body. It can last a lifetime, or disappear in a few years.

Shellfish allergy

Wegener's granulomatosis

Wegener's granulomatosis is an uncommon disease that causes blood vessel inflammation that can damage lungs, kidneys and other organs. Untreated, it can be fatal.

Apr. 10, 2014