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Learning Center
Orchitis
This inflammation of one or both testicles can cause pain and infertility. It's usually caused by a bacterial infection or the mumps virus.
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.
Neck lift
Find out how this cosmetic procedure removes excess skin and fat around the jaw line to create a more youthful appearance.
Nasopharyngeal carcinoma
Nasopharyngeal carcinoma is cancer that occurs in the nasopharynx, which is located behind your nose and above the back of your throat.
Mononucleosis: Can it recur?
Mono can return in some rare cases. Learn why that happens.
Moldy cheese: Is it OK to eat?
Moldy cheese may be unappetizing, but is it unsafe?
Mild cognitive impairment (MCI)
Learn more about this stage between the typical cognitive decline of aging and the more serious decline of dementia.
Microcephaly
Learn more about microcephaly, when an infant's head is smaller than expected. The condition affects child development.
Meatless meals: The benefits of eating less meat
Meatless meals are an easy way to eat healthfully and save money.
Mayo Clinic Minute: Steam treatment for enlarged prostate
Find out how steam treatment for enlarged prostate works.
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