emotional deprivation; infections in the womb before birth; bone
diseases; and genetic or chromosomal abnormalities.
published a comprehensive medical description of the syndrome. It was
chromosome material. Turner’s Syndrome is a rare chromosomal disorder
two X-chromosomes. However, in those with Turner’s Syndrome, one X
chromosome is absent or is damaged.
Depending on the doctor, Turner’s Syndrome may be diagnosed with one of
the following alternative names: 45 – X Syndrome, Bonnevie-Ulrich
Syndrome, Chromosome X, Monosomy X, Morgagni-Turner-Albright Syndrome,
Ovarian Dwarfism, Turner Type, among others.
A reduced growth in height is the commonest visible characteristic of
the syndrome, (the average adult height is 4 feet 8 inches) and may be
the age of about 2 years, growth in height is approximately normal, but
then it lags behind that of other girls. Greatly reduced growth in
diagnosis has already been made. Early diagnosis is very importance in
for development. Early diagnosis is also important in case surgical
treatment of the congenital heart defect (seen in about 20 per cent of
cases) is indicated. The commonest defect is a narrowing of the main
artery from the heart aortic coarctation. A regular ultrasound
examination of the heart is recommended in all girls with Turner
syndrome. This type of heart defect is present at birth and can be
corrected surgically. If not present at birth, it does not develop later
in life. The lack of sexual development at puberty is the second most
common characteristic. Having abnormal chromosomes does not mean that
condition that causes short stature and poorly developed ovaries.
Affected females may also exhibit the following symptoms: infertility,
kidney abnormalities, thyroid disease, heart disease, abnormalities of
the eyes and bones, webbed neck, low hairline, drooping of eyelids,
abnormal bone development, absent or retarded development of physical
features that normally appear at puberty, decrease of tears when crying,
simian crease (a single crease in the palm), a “caved-in” appearance to
the chest, puffy hands and feet, unusual shape and rotation of ears,
soft upturned nails, small lower jaw, arms turned out slightly at
elbows, shortened 4th fingers, small brown moles, hearing loss,
The normal female has 46 chromosomes, of which the two sex chromosomes
are X-chromosomes. This is expressed as 46,XX (men: 46,XY). In many
women with Turner syndrome, one of the X-chromosomes lacks completely,
and the chromosome pattern then becomes 45,X.
of ovaries and female sex hormones, and to growth in height. Girls with
Turner syndrome are generally born with ovaries and egg cells, but the
lack of X-chromosome material results in gradual disappearance of the
egg cells. At some point in childhood, usually during the first years of
life, no egg cells remain. Ovaries are then present without egg cells.
The female sex hormone (oestrogen), necessary for the girl to start
puberty, is usually produced by the egg cells. In girls with Turner
syndrome, insufficient oestrogen is produced for the girl to start
puberty. Neither spontaneous development of puberty nor the accompanying
growth spurts are seen in girls with Turner syndrome.
The cause of the change in the sex chromosome that leads to Turner
syndrome is not known, nor is it known why the different symptoms
related to the syndrome develop. Other chromosome defects are more often
this does not seem to apply to Turner syndrome. . In some cases of
Turner’s Syndrome, however, one X chromosome is missing from the cells
(45,X); research studies suggest that approximately 40 percent of these
individuals may have some Y chromosomal material in addition to the one
X chromosome. In other affected females, both X-chromosomes may be
present, but one may have genetic defects. In still other cases, some
cells may have the normal pair of X-chromosomes while other cells do not
(45,X/46,XX mosaicism). Although the exact cause of Turner’s Syndrome is
not known, it is believed that the disorder may result from an error
during the division (meiosis) of a parent’s sex cells.
In about 80 per cent of cases, where the whole of one of the
X-chromosomes is missing (45,X), it is thought to be the father’s
X-chromosome that is absent.
In recent years, the condition has been treated using a growth hormone,
given as injections under the skin (subcutaneous) in the evening.
Experiments are relatively limited. So far, researchers think it will be
possible to increase the final height by 5-10 centimeters, depending on
the duration of treatment. Treatment is started at slightly different
ages in different countries, but often at an age of about 6-7 years.
In order to achieve puberty development and a body height of more than
the average of about 146 cm, oestrogen and growth hormone must be given.
Oestrogen therapy should start after one has taken the growth hormone
for at least two years (about 12-13 years old is average), using small
doses at first to promote sexual development. Oestrogen is gradually
supplemented by progesterone (a stronger female hormone) as the girl
matures. The treatment can be given as tablets, injections, or oestrogen
Identification and Cure
Although Turner Syndrome can be identified in the fetus or with a blood
test, there is not a known cure for it.
With growth hormone replacement therapy and oestrogen injections (female
hormones), the female victim of Turner syndrome can live an outwardly
possible for these women to marry and raise children.