Healthy diets
Learning Center
Mononucleosis: Can it recur?
Mono can return in some rare cases. Learn why that happens.
Nasopharyngeal carcinoma
Nasopharyngeal carcinoma is cancer that occurs in the nasopharynx, which is located behind your nose and above the back of your throat.
Obstructive sleep apnea
Learn the signs that point to this common and potentially serious sleep disorder. And find out the treatments that can help you sleep better.
Ovarian cysts and infertility: A connection?
Certain types of ovarian cysts can contribute to fertility problems.
Paleo diet: What is it and why is it so popular?
Is a diet based on what early humans might have eaten right for modern humans?
Paraneoplastic syndromes of the nervous system
This group of conditions affects people who have cancer and occurs when parts of the immune system attack parts of the nervous system.
Peritonitis
Learn about the causes, symptoms and treatment of peritonitis.
Phantosmia: What causes olfactory hallucinations?
Phantosmia is often due to a head injury or upper respiratory infection.
Plugged ears: What is the remedy?
Plugged ears are usually a mild, temporary problem. Learn about potential causes and treatments.
Pneumonia
Pneumonia — Learn about the symptoms, causes and treatment of this serious lung infection.
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