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Spinal arteriovenous malformation (AVM)

Learn about how this rare blood vessel condition can affect the spinal cord.

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Spinal cord injury

Learn what may happen after the spinal cord has been damaged.

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Spinal cord tumor

Spinal cord tumors can cause serious problems such as pain and paralysis. Find out about…

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Spinal fusion

This procedure connects two or more bones in the spine. The bones then can't move,…

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Spinal headaches

These headaches can happen after a spinal tap procedure or spinal anesthesia, and usually don’t…

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Spinal injury: First aid

How to administer first aid for a spinal injury.

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Spinal stenosis

This condition narrows the amount of space within the spine. This can squeeze the nerves…

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Spinal tumor

Learn about symptoms, causes, risk factors, diagnosis and treatment options for tumors affecting the spine.

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Spirometry

This common test shows how well your lungs work and helps diagnose conditions that affect…

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Spitting up in babies: What's OK, what's not

Spitting up in babies is common. Most often it's nothing to worry about.

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Splenectomy

The spleen helps the body fight infection, but people can live without a spleen. Learn…

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Spontaneous coronary artery dissection (SCAD)

A torn blood vessel in the heart can cause a heart attack. Learn about the…

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Sprain: First aid

How to give first aid for a sprain.

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Sprained ankle

Sprained ankle — Injury to a ligament of the ankle can usually be treated with…

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Sprains

A sprain is a stretching or tearing of ligaments — the tough bands of tissue…

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Squamous cell carcinoma of the skin

This common skin cancer usually looks like a bump or a scaly sore. Learn about…

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St. John's wort

Understand how St. John's wort is used to treat depression and the risks of using…

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Stage 4 (metastatic) colon cancer

Find out about symptoms and complications for this advanced stage of colon cancer. Learn about…

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Stages of labor and birth: Baby, it's time!

Find out what happens during the different stages of labor and birth.

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Standing forward bend

Relax with this yoga pose and stretch your back and legs.

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Staph infections

Learn about the symptoms, causes and treatment of these potentially lethal infections.

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Statin side effects: Weigh the benefits and risks

Statin side effects can be uncomfortable but are rarely dangerous.

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Statins: Are these cholesterol-lowering drugs right for you?

Learn more about the risks and benefits of taking cholesterol-lowering medicines before deciding if they're…

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Statins: Do they cause ALS?

These medicines for high cholesterol can cause muscle injury in some people. But can they…

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STD testing: What's right for you?

Find out how your risk factors affect the types of tests you'll likely need for…

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Stem cells: What they are and what they do

Get answers about where stem cells come from, why they're important for understanding and treating…

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Stereotactic body radiotherapy

This type of radiotherapy uses highly targeted radiation beams to treat tumors in all parts…

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Stereotactic radiosurgery

Stereotactic radiosurgery (SRS) uses radiation beams to treat tumors in all parts of the body.…

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Stevens-Johnson syndrome

Learn more about the causes of this rare disorder of the skin and mucous membranes,…

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Stomach cancer

Stomach cancer, which is also called gastric cancer, is cancer that begins in the stomach.…

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