What is TS?
What is Turner Syndrome?
The members of our Society would like readers to consider that this site contains a great deal of information, most will apply to the general population of those with TS and some will apply to only some of those with TS. TS is a variable condition and every girl and woman with TS is unique and no generalization will apply to everyone, no matter how accurate it is for the group. The majority of those with TS are healthy and well adjusted; some face specific physical, emotional, social or learning challenges. All benefit from proper medical care, emotional support and careful screening for related conditions. The creation of a health care team is important and YOU are a vital part of it.
Turner syndrome (TS) is a chromosomal condition that describes girls and women with common features that are caused by complete or partial absence of the second sex chromosome. The syndrome is named after Dr. Henry Turner, who was among the first to describe its features in the 1930's. TS occurs in approximately 1 of every 2,500 female births and in as many as 10% of all miscarriages. Learn more about Henry Turner through this PDF.
Diagnosis is made through a test called a karyotype, which is usually performed on cells in the amniotic fluid before birth and on cells in the blood after birth.
Turner vs Turner's? The clinical term is Turner syndrome with the "S" uncapitalized. Since it is the last name of a person "Turner" is capitalized but syndrome is not. Since the syndrome does not "belong" to Dr. Henry Turner there is no need to add the S to Turner. You will find a few variations of the name as well; Ullrich-Turner syndrome and gonadal dysgenesis.
Mosaic Turner syndrome is explained more at http://www.turnersyndrome.org/resources/healthcare-topics
Primary characteristics of Turner syndrome
The most common feature of Turner syndrome is short stature. The average height of an adult TS woman who has not received human growth hormone treatment is 4’8”. Individuals tend to be a little shorter at birth, averaging 18.5” compared to an average of 20” for all girls. Growth failure continues after birth, and most girls with TS fall below the normal female growth curve for height during early childhood. TS girls who are not treated with hormone replacement usually do not have a pubertal growth spurt; many will continue to grow at a slow rate until they are in their twenties. Many girls who undergo growth hormone treatment have been able to achieve adult height within the lower range of normal.
Premature Ovarian Failure
Most (90%) TS individuals will experience early ovarian failure. In the general population, the ovaries produce eggs and hormones necessary for the development of secondary sexual characteristics. Estrogen replacement therapy is necessary for breast development, feminine body contours, menstruation and proper bone development. About a third of TS individuals will show some signs of breast development without estrogen treatment; however, many will not complete puberty, and those that do often have premature ovarian failure. Therefore, the majority of individuals will require estrogen from puberty until the normal age of menopause. Fertility without assisted reproduction therapy is rare (less than 1%).
TS individuals are on average of normal overall intelligence with the same variance as the general population. They do, however, often have difficulty with spatial-temporal processing (imagining objects in relation to each other), nonverbal memory and attention. This may cause problems with math, sense of direction, manual dexterity and social skills. New and better ways to compensate for these problems, which currently fall under the general category of nonverbal learning disabilities, are being researched.
Physical Features that may be associated with TS
· Narrow, high-arched palate (roof of the mouth)
· Retrognathia (receding lower jaw)
· Low-set ears
· Low hairline (the hair on the neck is closer to the shoulders)
· Webbed neck (excess or stretched skin)
· Slight droop to eyes
· Strabismus (lazy eye)
· Broad chest
· Cubitus valgus (arms that turn out slightly at the elbows)
· Scoliosis (curvature of the spine)
· Flat feet
· Small, narrow fingernails and toenails that turn up (usually if lymphedema was present at birth)
· Short fourth metacarpals (the ends of these bones form the knuckles)
· Edema (swelling or puffiness) of hands and feet; especially at birth
What are the associated risks with Turner syndrome?
Several medical problems occur more frequently in individuals with Turner syndrome than in the general population. It is important that TS individuals are screened regularly to see if any of these problems exist. Most of these conditions can be managed successfully with good medical care.
Some form of cardiac abnormality occurs in approximately one-third of TS patients. Problems are primarily left-sided and may include:
· Coarctation (narrowing) of the aorta and bicuspid aortic valve (a valve with two leaflets instead of the usual three).
· TS individuals are also at higher risk for hypertension or high blood pressure.
· TS patients should receive an echocardiogram or MRI to evaluate the heart at the time of diagnosis regardless of age and have their heart re-evaluated periodically for aortic root enlargement.
· All individuals with TS should be aware of the symptoms of dissection of the aorta, an uncommon but life-threatening complication.
hese include sudden, severe, sharp, stabbing, tearing, or ripping chest pain, intense anxiety, rapid pulse, profuse sweating, nausea and vomiting, dizziness, fainting or shortness of breath.
Thirty percent of TS individuals will have kidney abnormalities. Many of the abnormalities do not cause any medical problems; however, some may result in urinary tract infections and an increased risk of hypertension. It is recommended that TS individuals receive a renal ultrasound examination at the time of diagnosis.
Hypothyroidism (low level of thyroid hormone) caused by autoimmune thyroiditis (inflammation of thyroid gland) occurs frequently in individuals with TS. It can be diagnosed with a blood test and is easily treated with thyroid hormone.
Otitis media (ear infection) is extremely common in TS girls particularly in infancy and early childhood. Aggressive treatment of infections is appropriate. The majority (50-90%) of TS women will also develop early sensorineural (nerve) hearing loss and may require hearing aids earlier than the general population.
Girls and women with Turner syndrome are at higher risk for developing celiac disease, the body develops a toxic reaction to gluten, than the rest of the population.