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Definition Scarlet fever is a common infectious disease caused by group A streptococcus. The bacteria infect the throat and release a toxin that leads to a rash all over the body. The incubation period for the infection is less than one week, and the rash usually breaks out on the …

What is Sudden Infant Death Syndrome? Sudden infant death syndrome (SIDS) is the sudden and unexplained death of a baby younger than 1-year-old. A diagnosis of SIDS is made if the baby’s death remains unexplained even after a death scene investigation, an autopsy and a review of the clinical history. …

What is Spinal Stenosis? Spinal stenosis is a disorder that is caused by a narrowing of the spinal canal. This narrowing happens as a result of the degeneration of both the facet joints and the intervertebral discs. In this condition, bone spurs (also called osteophytes) grow into the spinal canal. …

Overview of Spinal Cord Injury The spinal cord is very sensitive to injury. Unlike other parts of your body, the spinal cord does not have the ability to repair itself if it is damaged. A spinal cord injury occurs when there is damage to the spinal cord either from trauma, …

Sweet syndrome – Overview Sweet syndrome is a rare condition that involves a painful rash, typically along with a fever. The rash erupts mostly on the skin of the arms, neck, head, and trunk. The cause of Sweet’s syndrome isn’t fully known, but there are several typical scenarios in which …

Description Sarcoidosis is a disease that results from a specific type of inflammation of tissues of the body. It can appear in almost any body organ, but it starts most often in the lungs or lymph nodes. The cause of sarcoidosis is unknown. The disease can appear suddenly and disappear. …

Overview of Sciatica Sciatica is a pain in the lower extremity resulting from irritation of the sciatic nerve. The pain of sciatica is typically felt from the low back (lumbar area) to behind the thigh and can radiate down below the knee. The sciatic nerve is the largest nerve in …

Description – SCID Severe combined immunodeficiency (SCID) is the name given to a group of rare, inherited disorders that cause major abnormalities of the immune system. They form part of a larger group of conditions known as primary immunodeficiencies. The immune system abnormalities in SCID lead to greatly increased risks …