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Emphysema is a chronic lung condition in which the air sacs (alveoli) may be destroyed, narrowed, collapsed, stretched, or overinflated. Pulmonary emphysema is part of a group of lung diseases called COPD. Here's what you need to know.

Work-related lung diseases are lung problems that are made worse in certain work environments. They are caused by long-term exposure to certain irritants that are breathed into the lungs. These lung diseases may have lasting effects, even after the exposure ends. Read on for more details.

Detailed information on actinic keratosis, including causes and treatment.

Detailed information on skin cancer prevention, including protecting children from the sun.

A look at how open surgery compares to minimally invasive surgery, including different types of procedures.

See your doctor as early as possible before you leave on your trip. Discuss any risks that may be involved and plan for immunizations, medicine, and medical devices you may need while you're away.

Benign prostatic hyperplasia (BPH) is also called benign prostatic hypertrophy. It means that the prostate gland has become very large and may cause problems passing urine. BPH is not cancer. It's a common part of aging.

Kidney failure happens when damage results in loss of normal kidney function. It may also be called end-stage renal disease (ESRD).

When the kidneys' filters (glomeruli) become inflamed and scarred it is called glomerulonephritis. The kidneys slowly lose their ability to remove wastes and excess fluid from the blood to make urine.