Spinal stenosis information from trusted sources:
The spinal canal is formed by the openings of a series of bones (vertebrae) stacked on top of each other.
Your spine, or backbone, protects your spinal cord and allows you to stand and bend. Spinal stenosis causes narrowing in your spine. The narrowing can occur at the center of your spine, in the canals branching off your spine and/or between the vertebrae, the bones of the spine. The narrowing puts pressure on your nerves and spinal cord and can cause pain. Spinal stenosis occurs mostly in people older than 50. Younger people with a spine injury or a narrow spinal canal are also at risk. Diseases such as arthritis and scoliosis can cause spinal stenosis, too. Symptoms might appear gradually or not at all. They include pain in your neck or back, numbness, weakness or pain in your arms or legs, and foot problems. Treatments include medications, physical therapy, braces and surgery.
Spinal stenosis is a narrowing of one or more areas in your spine most often in your upper or lower back. This narrowing can put pressure on your spinal cord or on the nerves that branch out from the compressed areas.
Lumbar Spinal Stenosis
Lumbar (LUM-bahr) spinal (SPI-nal) stenosis (ste-NO-sis) is a narrowing of the spinal canal in the lower back. The spinal canal runs in the middle of the spine and contains the spinal cord. Your spine is made up of many vertebrae (back bones) stacked on one another. Between each bone is a disc which serves as cushion. The spinal cord is where nerves that carry messages from your brain go to the rest of the body. When lumbar spinal stenosis happens, the nerves that go to the legs may be squeezed. With treatment, more serious problems of lumbar spinal stenosis may be prevented and your quality of life improved.
Most babies spit up at least occasionally, and it's usually nothing to worry about. Sometimes, however, forceful spitting up is a sign of a more serious condition known as pyloric stenosis.
Pyloric stenosis is a narrowing of the pylorus, the opening from the stomach into the small intestine.
Mitral valve stenosis
Mitral valve stenosis or mitral stenosis is a condition in which the heart's mitral valve is narrowed (stenotic). This narrowing blocks the valve from opening properly, obstructing blood flow through your heart and from your heart to the rest of your body. Mitral valve stenosis can make you tired and short of breath, among other problems.
Aortic valve stenosis
Aortic valve stenosis or aortic stenosis occurs when the heart's aortic valve narrows. This narrowing prevents the valve from opening fully, which obstructs blood flow from your heart into your aorta and onward to the rest of your body.
Mitral (MI-trul) stenosis (sten-O-sis) is also called "MS". It is a disease of the mitral valve. The mitral valve is one of the doors in the heart. MS is a condition where the two leaflets of the mitral valve get thicker and stiffer. The two small leaflets of the mitral valve come from the front and back of the valve and meet in the middle. "Stenosis" means narrow or tight. A stenosis causes the valve opening to get smaller. A smaller opening makes it harder for blood to flow through the heart.