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Pituitary tumors are abnormal growths that develop in your pituitary gland. Some pituitary tumors result in too many of the hormones that regulate important functions of your body. Some pituitary tum...

The brachial plexus is the network of nerves that sends signals from your spinal cord to your shoulder, arm and hand. A brachial plexus injury occurs when these nerves are stretched, compressed, or in...

A nerve biopsy is a surgical procedures to collect and test a sample of abnormal tissues. The biopsy sample is examined in the lab under a microscope. Biopsy results can help the care team determine a...

A peripheral nerve tumor is a growth in or near nerves that transmit signals from your brain to the rest of your body. These nerves control your muscles so you can walk, blink, swallow, pick things up...

Sciatica refers to pain that radiates along the path of the sciatic nerve, which branches from your lower back through your hips and buttocks and down each leg. Typically, sciatica affects only one si...

Scoliosis is a sideways curvature of the spine that occurs most often during the growth spurt just before puberty. While scoliosis can be caused by conditions, such as cerebral palsy and muscular dys...

Spinal stenosis is a narrowing of the spaces within your spine, which can put pressure on the nerves that travel through the spine. It occurs most often in the lower back and neck, and is commonly cau...

Chiari malformation is a condition in which brain tissue extends into your spinal canal. It occurs when part of your skull is abnormally small or misshapen, pressing on your brain and forcing it down...

Cervical spondylosis is a general term for age-related wear and tear affecting the spinal disks in your neck. As the disks dehydrate and shrink, signs of osteoarthritis develop, including bony project...

A herniated disk refers to a problem with one of the rubbery cushions (disks) between the individual bones (vertebrae) that stack up to make your spine. A spinal disk is a little like a jelly donut w...