Thursday, 17 July 2014

Ankylosing Spondylitis

Definition

Ankylosing spondylitis is an inflammatory disease that can cause some of the vertebrae in your spine to fuse together. This fusing makes the spine less flexible and can result in a hunched-forward posture. If ribs are affected, it may be difficult to breathe deeply.

Ankylosing spondylitis affects men more often than women. Signs and symptoms of ankylosing spondylitis typically begin in early adulthood. Inflammation also can occur in other parts of your body — most commonly, your eyes.
There is no cure for ankylosing spondylitis, but treatments can decrease your pain and lessen your symptoms.
        

Symptoms

Early signs and symptoms of ankylosing spondylitis may include pain and stiffness in your lower back and hips, especially in the morning and after periods of inactivity. Over time, symptoms may worsen, improve or stop completely at irregular intervals.
The areas most commonly affected are:
  • The joint between the base of your spine and your pelvis
  • The vertebrae in your lower back
  • The places where your tendons and ligaments attach to bones, mainly in your spine, but sometimes along the back of your heel
  • The cartilage between your breastbone and ribs
  • Your hip and shoulder joints

When to see a doctor

Seek medical attention if you have low back or buttock pain that came on slowly, is worse in the morning or awakens you from your sleep in the second half of the night — particularly if this pain improves with exercise and worsens with rest. See an eye specialist (ophthalmologist) immediately if you develop a painful red eye, severe light sensitivity or blurred vision.

Causes

Ankylosing spondylitis has no known specific cause, though genetic factors seem to be involved. In particular, people who have a gene called HLA-B27 are at significantly increased risk of developing ankylosing spondylitis.

Risk factors

  • Your sex. Men are more likely to develop ankylosing spondylitisthan are women.
  • Your age. Onset generally occurs in late adolescence or early adulthood.
  • Your heredity. Most people who have ankylosing spondylitis have the HLA-B27 gene. But many people who have this gene never develop ankylosing spondylitis.

    Complications

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    In severe cases of ankylosing spondylitis, new bone forms as part of the body's attempt to heal. This new bone gradually bridges the gap between vertebrae and eventually fuses sections of vertebrae together. Those parts of your spine become stiff and inflexible. Fusion can also stiffen your rib cage, restricting your lung capacity and function.
    Other complications may include:
    • Eye inflammation (uveitis). One of the most common complications of ankylosing spondylitis, uveitis can cause rapid-onset eye pain, sensitivity to light and blurred vision. See your doctor right away if you develop these symptoms.
    • Compression fractures. Some people experience a thinning of their bones during the early stages of ankylosing spondylitis. Weakened vertebrae may crumble, increasing the severity of your stooped posture. Vertebral fractures sometimes can damage the spinal cord and the nerves that pass through the spine.
    • Heart problems. Ankylosing spondylitis can cause problems with your aorta, the largest artery in your body. The inflamed aorta can enlarge to the point that it distorts the shape of the aortic valve in the heart, which impairs its function.
  • Tests and diagnosis

    During the physical exam, your doctor may ask you to bend your back in different directions. He or she may also measure your chest circumference — once with your lungs empty and once with them full of air — to compare the difference.
    Your doctor may also try to reproduce your pain by pressing on specific portions of your pelvis or by moving your legs into a particular position. He or she might also ask you to try to stand upright, with your heels and the back of your head against a wall.

    Imaging tests

    X-rays allow your doctor to check for changes in your joints and bones, though the visible signs of ankylosing spondylitis may not be evident early in the disease.
    Magnetic resonance imaging (MRI) uses radio waves and a strong magnetic field to provide more-detailed images of bones and soft tissues. MRI scans can reveal evidence of ankylosing spondylitis earlier in the disease process, but are much more expensive.

    Lab tests

    There are no specific lab tests to identify ankylosing spondylitis. Certain blood tests can check for markers of inflammation, but inflammation can be caused by many different health problems. Your blood can be tested for the HLA-B27 gene, but most people who have that gene don't have ankylosing spondylitis.

Lifestyle and home remedies

If you smoke, quit. Smoking is generally bad for your health, but it creates additional problems for people with ankylosing spondylitis. Depending on the severity of your condition, ankylosing spondylitis can affect the mobility of your rib cage. Damaging your lungs by smoking can further compromise your ability to breathe.









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