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The sciatic nerve is the largest nerve in the body, formed by nerve roots coming out of the spinal cord in the lower back. The

Scarlet fever is an infection that can happen with strep throat. It is caused by the same bacteria that cause strep throat

The scrotum is a sac that hangs below the base of the penis. It contains the two oval organs (testicles) that produce sperm and

Scleroderma is an uncommon disease in which parts of the skin and blood vessels break down and are replaced by fibrous tissue

Sclerotherapy is a nonsurgical treatment to get rid of varicose veins. A chemical called a sclerosant is injected into the

Scabies is an itchy skin condition caused by tiny mites that burrow into the outer layers of the skin. The scabies mites are

A scoliometer is an instrument that is used to estimate the amount of curve in a person's spine. It may be used as a tool for

Scoliosis is a problem with the curve in your spine. In scoliosis, your spine makes a large curve from side to side in the shape

Sciatica is pain caused by irritation or pressure against the nerve roots of the sciatic nerve. People with sciatica usually have

Schizophrenia is a severe mental illness that can affect your ability to think clearly, manage your emotions, and interact with