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Stage 4 prostate cancer
Find out about diagnosis and treatment of this cancer that has spread to the lymph nodes or other parts of the body.
Spinal cord tumor
Spinal cord tumors can cause serious problems such as pain and paralysis. Find out how more about management and treatment.
Spermatocele
Learn more about this noncancerous testicular disorder that may require surgery if it's causing discomfort. But, the condition often needs no treatment.
Spastic colon: What does it mean?
This term is sometimes used to refer to irritable bowel syndrome (IBS) — but how accurate is it?
Slide show: How your brain works
Which part of your brain does what? Take a tour with this slide show.
Sleep-tracking devices: Dos and don'ts
Sleep trackers may help improve your sleep, but don't jump to conclusions based on your data. Get the facts from a Mayo Clinic wellness specialist.
Sleep tips: 6 steps to better sleep
Better sleep can be yours! Consider sleep tips for the weary.
Sleep aids: Understand options sold without a prescription
Get the facts on common sleep aids sold without a prescription, including precautions and side effects.
Sleep aids: Could antihistamines help me sleep?
Antihistamines can be somewhat effective as a sleep aid — but only for occasional sleeplessness.
Signs of labor: Know what to expect
Know exactly what to expect as your due date approaches and your body prepares for delivery.
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