Andre, This was in the NYT today, pretty interesting. CausesIn this syndrome, a problem with a gene causes cells to be less responsive to male hormones called androgen's. It is also called Partial Androgen Insensitivity Syndrome.
As a male baby grows in the womb, male hormones (androgen's) are made. As a result, male sexual organs develop. However, sometimes there is a change in the gene that helps make a protein (receptor) that tells the body how to use androgen properly. If androgen cannot be processed normally because of a defect in this protein, problems with the development of the male sex organs occur. At birth, this may result in confusion over the sex of the baby due to ambiguous genitalia.
The disease is inherited in an X-linked recessive manner, which means that women are not affected but may carry the gene. Males who inherit the gene from their mothers will have the condition. There is a 50% chance that a male child of a mother with the gene will be affected. Family history is important in determining risk factors.
The syndrome is estimated to affect 1 in 99,000 people.
SymptomsSymptoms include:
- Sexual dysfunction in males and infertility
- Abnormal male genitals
- Undescended testes
- Small scrotum, with a line down the middle (bifid) or incompletely closed
- small penis
- Hypospadias (the urethra exits the body on the side of the penis, not the tip)
Breast development in males at time of puberty
Decreased body hair and beard, but normal pubic and armpit hair
Signs and TestsThe doctor will perform a physical exam. The male may have:
- Decreased or absent vas deferens (the tubes through which sperm exit the testes)
- Partial development of female sex organs
Tests may include:
- Blood tests to check for high levels of testosterone and luteinizing hormone
- Sperm count
- Testicular biopsy
- Genetic tests to look for defects in the androgen receptor gene
TreatmentEarly and continuous testosterone treatment may improve the chance that a boy will grow up to be fertile.
Support GroupsAndrogen Insensitivity Syndrome Support Group (AISSG) --
www.medhelp.org/www/ais/ Intersex Society of North America (ISNA) --
www.isna.org Expectations (prognosis)Androgens are most important during early development in the womb. Those with Reifenstein syndrome can have a normal lifespan and be totally healthy, with the exception of infertility and possible psychological problems related to gender identity.
In the most severe cases, psychological and emotional problems may occur in boys with outer female genitalia or an extremely small penis. In some cases, parents have tried to raise people with Reifenstein syndrome as girls. This is rarely effective.
Genital surgery should be postponed until the patient can make an informed choice.
Complications
- Infertility and failure to develop normal male gonads/genitals.
- Breast development in men can be a cosmetic concern.
- Psychological problems like depression may occur.
Calling Your Health Care ProviderCall your health care provider if you, your son, or a male family member has infertility or incomplete development of male external organs, despite high blood testosterone. Genetic testing and counseling is available if there is a strong suspicion that this disease is present.
PreventionPrenatal testing is available. People with a family history of these conditions should consider genetic counseling. Testosterone treatment that is started early may prevent some infertility.