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Reifenstein syndrome

 

Definition

Reifenstein syndrome is one of a group of diseases in which the body is unable to respond appropriately to the male sex hormones (androgens), which include testosterone.

Alternative Names

Partial androgen insensitivity syndrome; Incomplete male pseudohermaphroditism

Causes

As a male baby grows in the womb, male hormones (androgens) are made. This leads to the development of male sex organs.

In this condition, there is a change in the gene that helps the body recognize and use male hormones properly. This leads to problems with the development of the male sex organs. At birth, the baby may have ambiguous genitals, which leads to confusion over the baby's sex.

The syndrome is passed down through families (inherited). 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. Every female child has a 50% chance of carrying the gene. Family history is important in determining risk factors.

The syndrome is estimated to affect 1 in 99,000 people.

Symptoms
Signs and tests

The doctor will perform a physical exam. The male may have:

  • Partially developed female sex organs
  • Small or absent vas deferens (the tubes through which sperm exit the testes)

Tests may include:

Support Groups

Androgen 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, but they may be infertile and have psychological problems related to gender identity.

In the most severe cases, boys with outer female genitals or an extremely small penis may have psychological and emotional problems.

Genital surgery should be postponed until the patient is old enough to make the decision.

Calling your health care provider

Call your health care provider if you, your son, or a male family member has infertility or incomplete development of male genitals. Genetic testing and counseling are always recommended if this disease is suspected.

Complications
  • Breast development in men
  • Infertility and failure to develop normal male genitals
  • Psychological problems, such as depression
Treatments

Treatment with testosterone may improve the chance that a boy will be able to have children when he grows up.

Prevention

Prenatal 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.


Review Date: 10/15/2008
Reviewed By: Diana Chambers, MS, EdD, Certified Genetics Counselor (ABMG), Charter Member of the ABGC, University of Tennessee, Memphis, TN. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
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