Developmental disorders of the vagina and vulva
    
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Developmental disorders of the vagina and vulva

Definition

Developmental disorders of the vagina and vulva include a variety of structural abnormalities that occur during fetal development.

Causes

With the union of a sperm and an ovum, an embryo acquires the chromosomes that determine the sex of the fetus (XX=female; XY=male). For the first 6 weeks, the sex of the fetus is not distinguishable.

At about 6 weeks gestation, ovaries begin to develop in those with two X chromosomes, and testicles develop in those with an X and Y chromosome. Sexual ambiguity may arise when additional X chromosomes are present, or the Y chromosome is not functioning correctly.

The X chromosome is the primary determinant of feminine traits. However, geneticists have noted over 200 traits that are thought to be X-chromosome linked (such as hemophilia and color blindness). In contrast, the Y chromosome has only been linked with testicular formation and the development of male secondary sexual characteristics during puberty.

As fetal development progresses through the pregnancy, problems may arise in the development of internal and/or external sexual organs. Since embryonic tissue is initially the same, with no male and/or female differentiation, such problems may cause genetic males to have "female" genital structures and genetic females to have "male" genital structures.

An example of this is true hermaphroditism. In the past, most of these individuals were raised as males since their external genitalia appeared more masculine. In fact, had early diagnosis been available, most should have been raised as females since they all developed significant breasts and many menstruated. After surgical removal of testicular tissue, some have even become pregnant and delivered normal children.

Symptoms

Symptoms may include:

  • Recurring pelvic pain
  • Lack of menstrual periods
  • Urinary retention
  • Painful intercourse
  • Absent menstruation

Exams and Tests

An inspection of the external genitalia may reveal:

  • One side of labia larger than the other, or unusually large on both sides
  • Vaginal opening extremely close to the urethra or anus
  • Urethra located on the clitoris
  • Enlarged clitoris

An examination of the vagina may reveal:

  • An absent or partially-formed vagina.
  • Fused labia.
  • An abnormal septum ("wall" of connective tissue) in the vaginal canal that may either partially or completely divide the vagina horizontally or vertically
  • An imperforate hymen (solid membrane obstructing the vaginal opening). In preadolescent girls, secretions may accumulate and cause vaginal swelling and a shiny, bulging protuberance at the vaginal opening. In adolescent girls, menstrual blood accumulates, causing a purplish-red, bulging protuberance at the vaginal opening.

Treatment

Early recognition of developmental disorders is important, particularly for those that involve sexual ambiguity.

  • Surgical treatment, indicated in some cases depending upon the abnormality, is usually recommended during the neonatal/infant period. In some instances, reconstruction may be deferred until after puberty. Surgical reconstruction is done to most closely associate physical characteristics with the gender role assigned to the individual child. This is best done with the expert advice of a geneticist or other specialist after chromosomal studies are completed.
  • Hormonal supplementation may also be necessary depending on the condition present.

Psychosocial support/counseling is required for the parents (and child when applicable) to address concerns and provide anticipatory guidance specific to the child's development.

Outlook (Prognosis)

Optimal outcome is based upon early identification of the abnormalities (during the neonatal period), early chromosomal studies, expert advice, and early intervention with treatment aimed at addressing physical, emotional, and social issues.

Possible Complications

Potential complications arise if a diagnosis is made late or in error. Children with apparent gender-specific external characteristics may be found, at puberty, to have internal sexual organ functions specific to the sex opposite from which they were raised. Occasionally, these internal sexual organs are at risk for cancer and must be surgically removed around the time of puberty.

When to Contact a Medical Professional

Call for an appointment with your health care provider if:

  • You notice abnormal gynecological structures
  • Breasts or pubic hair do not develop at puberty
  • The menstrual cycle does not begin at puberty
  • Unexpected male characteristics develop

Prevention

Adequate prenatal nutrition and avoiding exposure to illness, medications, and alcohol are all important for adequate fetal growth and development. Developmental disorders may still occur despite the mother's efforts to assure a healthy pregnancy. There is no current means of prevention.

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