This rare genetic disorder affects the way the brain develops, causing a progressive inability to use muscles for eye and body movements and language.
Disease
Reye's syndrome
Learn about the causes and treatment of this rare but serious condition causing swelling in the liver and brain.
Disease
Ringworm (scalp)
Learn more on causes, symptoms, treatments of this easily spread, itchy fungal skin infection and how to prevent it.
Disease
Rumination syndrome
Learn about this condition that results in regurgitating and reswallowing food. Behavioral therapy and medicine are treatments.
Disease
Ruptured spleen
A break in the surface of your spleen, usually from a forceful blow to your abdomen, can cause life-threatening internal bleeding.
Disease
Sacral dimple
Learn about the causes, complications and diagnosis of this indentation on the lower back present at birth in some babies.
Disease
Sacroiliitis
This joint inflammation can cause pain in the buttocks or lower back. The pain can go down one or both legs.
Disease
Salivary gland tumors
Learn about this rare tumor that forms in the salivary glands. Treatments include surgery and radiation therapy.
Disease
Salmonella infection
This common bacterial infection is spread through contaminated food or water and affects the intestinal tract. Learn more about prevention and treatment.
Disease
Sarcoidosis
This treatable inflammatory condition causes growth of tiny granulomas in different parts of the body, including the lungs, eyes, skin and heart.
Disease
Sarcoma
Learn about this cancer that forms in the bones and the connective tissue. Find out about symptoms, diagnosis, treatment and the many types of this condition.
Disease
Scabies
Learn more about this condition that spreads easily. It causes intense itching, most often where the skin folds, such as around joints.