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Stickler Syndrome

Definition :
Stickler syndrome is an inherited disorder than can affect multiple parts of your body, including your eyes, face, ears, heart, bones and joints. The cause of Stickler syndrome is a gene mutation that affects the formation of a connective tissue called collagen.

Stickler syndrome is named for a German doctor named Gunnar Stickler, who described the syndrome in a young boy in 1960. Stickler syndrome is usually diagnosed in young children. If your child has Stickler syndrome, treating the signs and symptoms can help your child manage the disorder and live a full, productive life.

Causes :
Stickler syndrome is an inherited disorder caused by a defective gene involved in the formation of a protein called collagen. Collagen is the building block of many types of connective tissues, which support your body's internal structures.

Genes are segments of DNA that "code" for all of your characteristics — including traits you can see, such as eye color, and traits you can't see but that can affect your health, such as the propensity to develop high cholesterol. You receive your genes, which occur in

pairs, from your parents. One half of each pair is inherited from your mother, the other half is from your father. Some gene pairs can be made up of one dominant gene and one recessive gene. In these instances, the effect of a dominant gene "masks" the effect of a recessive gene. This pattern of inheritance is called autosomal dominant inheritance. If a dominant gene is mutated — as in the case of Sticker syndrome — disease may result.

If you have Stickler syndrome and your partner does not, the chances that you'll pass the condition on to any of your children is 50 percent. The severity of the signs and symptoms of Stickler syndrome can vary among family members.

Rarely, people may develop Stickler syndrome without inheriting a mutant gene. In these cases, Stickler syndrome results from a random mutation in one of your genes. It's not certain why random gene mutations occur.

Risk Factor :
Sticker syndrome is an inherited disorder. If you have Stickler syndrome and your partner does not, your child has a 50 percent chance — or a probability of one in two — of developing the condition.

When to seek medical advice :
Having Stickler syndrome increases your child's risk of serious eye complications. Call an eye specialist if your child describes any of the following Symptoms:

  • A sudden onset or increase in floaters — tiny bits of debris floating in the eye that appear as clumps or strings
  • Flashes of light in one or both eyes
  • A shadow over a portion of the visual field
  • A sudden blur in vision

These may be symptoms of retinal detachment, a serious eye condition requiring immediate surgical repair.

If you have Stickler syndrome and would like to have children, consider discussing your family plans with a genetic counselor. A genetic professional can explain how your disorder is inherited and its implications for your children, which may help you make informed personal decisions.

Symptoms :
A combination of the following signs and symptoms are common in children with Stickler syndrome :

  • Severe nearsightedness. This common condition, also called myopia, is a sight disorder in which you can see near objects clearly, but objects farther away appear blurry. Children with Stickler syndrome are often born with severe nearsightedness.
  • Altered facial features. Children with Stickler syndrome often have a somewhat flattened facial structure with a small nose and a slight or absent nasal bridge. These altered features often become less distinctive with age.
  • Hearing difficulties. The extent of hearing loss varies among people with this condition. The hearing loss associated with Stickler syndrome tends to worsen over time.
  • Excessive joint flexibility. The ability to painlessly extend the joints beyond the normal range of motion is a characteristic of people with Stickler syndrome. As your child gets older, any extreme joint flexibility will likely lessen or disappear and your child may develop achy, swollen joints.

Other signs of Stickler syndrome may include slender arms and legs and long fingers.

Diagnosis :
Your doctor may suspect Stickler syndrome based on a combination of the following signs and Symptoms:

  • Eye abnormalities at birth. Eye examinations help detect eye problems that are often present at birth in children with Stickler syndrome. These include a clouding of the normally clear lens of your eye (cataracts) or a defect in the jelly-like material (vitreous) filling your eye. Severe nearsightedness may be observed in older children who take vision tests.
  • Impaired hearing. Your doctor may use a test called an audiogram — which measures your ability to detect different pitches and volumes of sound — to determine whether your child has experienced hearing loss.
  • Altered facial features. During a physical exam, your doctor examines your child's face for features specific to Stickler syndrome — a flattened facial structure, a small nose, and a slight or absent nasal bridge. Some children also have a series of facial abnormalities that include an opening in the roof of the mouth (cleft palate), a large tongue and a small lower jaw.
  • Excessive joint flexibility. Your doctor may stretch your child's arms and legs to determine the extent of his or her flexibility. If your child has Stickler syndrome, he or she may be able to extend the arms and legs beyond the range of motion that is comfortable for most people.
  • Mitral valve prolapse. Mitral valve prolapse, a disorder in which one of your heart valves doesn't close properly, has been reported in people with Stickler syndrome. Your doctor may detect this condition while listening to your child's heart with a stethoscope.

Molecular genetic testing may be used to identify the mutant genes associated with Stickler syndrome, but it's not commonly used to diagnose this disorder. However, it's occasionally used to confirm a suspected diagnosis or for prenatal diagnosis.

Complications :
Your doctor may suspect Stickler syndrome based on a combination of the following signs and Symptoms:

  • Eye abnormalities at birth. Eye examinations help detect eye problems that are often present at birth in children with Stickler syndrome. These include a clouding of the normally clear lens of your eye (cataracts) or a defect in the jelly-like material (vitreous) filling your eye. Severe nearsightedness may be observed in older children who take vision tests.
  • Impaired hearing. Your doctor may use a test called an audiogram — which measures your ability to detect different pitches and volumes of sound — to determine whether your child has experienced hearing loss.
  • Altered facial features. During a physical exam, your doctor examines your child's face for features specific to Stickler syndrome — a flattened facial structure, a small nose, and a slight or absent nasal bridge. Some children also have a series of facial abnormalities that include an opening in the roof of the mouth (cleft palate), a large tongue and a small lower jaw.
  • Excessive joint flexibility. Your doctor may stretch your child's arms and legs to determine the extent of his or her flexibility. If your child has Stickler syndrome, he or she may be able to extend the arms and legs beyond the range of motion that is comfortable for most people.
  • Mitral valve prolapse. Mitral valve prolapse, a disorder in which one of your heart valves doesn't close properly, has been reported in people with Stickler syndrome. Your doctor may detect this condition while listening to your child's heart with a stethoscope.

Molecular genetic testing may be used to identify the mutant genes associated with Stickler syndrome, but it's not commonly used to diagnose this disorder. However, it's occasionally used to confirm a suspected diagnosis or for prenatal diagnosis.

Treatment:
Treatment for Stickler syndrome focuses on addressing the signs and symptoms of the disorder. There's no cure for Stickler syndrome.
  • Surgery. Babies born with a hole in the roof in their mouths (cleft palate) undergo surgery to repair the defect, usually nine months to a year after birth. During this procedure, tissue from the roof of the mouth may be stretched to cover the cleft palate. This surgery helps relieve problems feeding or breathing.
  • Corrective lenses. Corrective lenses are important for treating the severe nearsightedness associated with Stickler syndrome. Some people notice better corrected vision with contact lenses than with glasses.
  • Hearing aids. If your child has problems hearing, you may find that your child's quality of life is improved by wearing a hearing aid.
  • Anti-inflammatory medications. Medications such as ibuprofen (Advil, Motrin, others), naproxen (Aleve, Naprosyn, others) and aspirin relieve joint swelling, stiffness and pain. Taking these medications before or after physical activity may help your child move more comfortably.

In addition to treating any signs and symptoms, your child will likely continue seeing doctors regularly for eye exams and hearing assessments to monitor whether his or her vision and hearing change over time.

 
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.
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