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Scheuermann's disease is a condition in which some of the bones of the spine (vertebrae) develop wedge-shaped deformities. This

The sacrum is a large triangular bone at the bottom of the spine. It is inserted like a wedge between the two hipbones. The sacrum

Sarcoidosis is a rare disease that causes inflammation and scar tissue throughout the body, especially the lungs, lymph nodes

The sacroiliac joints form the junctions between the spine and each side of the pelvis. Like the vertebrae in the lower back

Nonprescription saline nasal sprays and nose drops are used to keep nasal tissues moist, relieve nasal irritation, and help thick

A secondary infection is a bacterial or viral illness that develops following a first illness. The second infection may develop

A sealant is a clear or white liquid plastic that may be applied to the grooves and pits on the chewing surfaces of the back teeth

A second opinion is an evaluation by a doctor after a person has already been examined, diagnosed, or treated by another doctor. A

Second-degree burns are injuries to the skin caused by heat, radiation, electricity, chemicals, or friction. These burns are also

Seborrheic keratoses are common noncancerous (benign) skin growths that men and women develop as they age. They may appear as one