Nutrition basics
Learning Center
Prostate cancer: Does PSA level affect prognosis?
Find out what your PSA level may mean for your prostate cancer prognosis.
Prostate cancer screening: Should you get a PSA test?
Learn about the pros and cons of the PSA test so you're ready to talk about prostate cancer screening with your doctor.
Progeria
This genetic disorder is extremely rare and progressive. It causes children to age rapidly, beginning in their first two years of life.
Positron emission tomography scan
Learn how this imaging scan can play an important role in early detection of health problems, such as cancer, heart disease and brain disorders.
Polysomnography (sleep study)
Your health care provider may order this test if a sleep disorder such as sleep apnea is suspected. Learn how to prepare and what to expect.
Phenylketonuria (PKU)
PKU is caused by a change in the gene that helps create an enzyme needed to break down phenylalanine. Treatment includes a special diet and medication.
Phenylalanine in diet soda: Is it harmful?
You may be worried about phenylalanine because of a warning on diet soda. Find out why the warning is there.
Peripheral nerve tumors
Learn about these growths that form in or near nerves connecting to the spinal cord. Surgery is the most common treatment.
Pectus excavatum
Pectus excavatum causes the breastbone to sink into the chest. This can affect heart and lung function. Surgery helps correct the deformity.
Patent foramen ovale
Learn more about the causes and complications of this condition in which a hole in the heart doesn't close the way it should after birth.
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