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Learning Center
Spermatocele
Learn more about this noncancerous testicular disorder that may require surgery if it's causing discomfort. But, the condition often needs no treatment.
Spider bites
Learn more about prevention, symptoms, complications and treatment of spider bites, which are usually harmless.
Spina bifida
Learn about this condition in which an unborn baby's spine and spinal cord don't form properly. Surgery during pregnancy may be a treatment option.
Spitting up in babies: What's normal, what's not
Spitting up in babies is common — and usually nothing to worry about.
Spontaneous coronary artery dissection (SCAD)
A torn blood vessel in the heart can cause a heart attack. Learn about the diagnosis and treatment of this medical emergency.
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.
Strep throat
Learn more about the symptoms, causes and treatment of this throat bacterial infection in children and adults.
Strep throat in young children: A common diagnosis?
Strep throat in young children is uncommon, but it's possible. Learn about symptoms.
Sudden death in young people: Heart problems often blamed
Sudden cardiac death in young people is rare. It's not the same as sudden cardiac arrest. Learn about the risk factors and causes and when screening is needed.
Sudden infant death syndrome (SIDS)
Learn about the unexplained death of a young baby who seems healthy.
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