Congenital Adrenal Hyperplasia

There are two main types of CAH: classical and nonclassical.

Classical CAH is more severe. It can be life threatening. Newborns in the United States (and many other countries) have a screening test to check for CAH so they can get treatment quickly. Along with low cortisol and high androgen levels, babies with classical CAH often have low aldosterone. This hormone helps maintain healthy levels of fluid, sodium and potassium.

Nonclassical CAH (NCAH) is milder. But it can still affect the body in many important ways. The effects can begin to show anytime from early childhood through adulthood. Treatment can help prevent, relieve or manage the effects. Some people with NCAH never have symptoms and don’t need any treatment.

Girls with classical CAH are often born with genitals outside the body that look more like those of a typical boy or appear to be ambiguous (not certain). They might have a large clitoris. It might look like a small penis. Their labia might be joined. (Inside, they have typical reproductive organs for a girl — uterus, ovaries and fallopian tubes.)

Boys with classical CAH show no outward signs when they are born. This is why all babies are screened for CAH.

Without treatment, newborns with CAH can develop serious symptoms within days or weeks. These can include weight loss, vomiting, dehydration, diarrhea, shock, heart rhythm problems and others, including coma or death.

Nonclassical CAH does not always cause symptoms. If it does cause symptoms, they can start at any age. The symptoms vary from person to person and may change over time.

Many common effects, like these, have to do with puberty and growth:

• Signs of early puberty (before age 8 for girls and before age 9 for boys), like pubic and underarm hair, body odor from sweating and moderate to severe acne
• An early growth spurt because bone growth starts sooner than usual and then shorter adult height because bone growth stops sooner than usual
• In girls, early age of first menstrual period, irregular periods and more or different body hair than is typical (like thick hair on their chin and upper lip)
• In boys, early beard growth and larger penis than typical for their age with small testes

To learn more about the effects of CAH on your child, we may take an X-ray of their hand and wrist. We do this to compare their actual bone growth to what’s typical for their age. This helps us understand how hormones are affecting their growth.

Genetic testing can look for genes that cause the enzyme problems seen in CAH. This isn’t usually needed to make a diagnosis. But it can help confirm the diagnosis and check how severe the enzyme problem is.

Usually, CAH happens when both parents pass a gene for this condition on to their child. Parents who have only 1 CAH gene change are carriers. They do not have CAH, but they can pass the gene on to their children. If you are or might be a carrier or you have CAH, genetic counseling can help you understand what this means for you.

Prenatal genetic testing can show whether your unborn baby has CAH. At Seattle Children’s, we don’t do this testing for CAH before birth. We may help coordinate testing with your obstetrician. We do help interpret your test results and talk with you about them.

Hormones (corticosteroids and mineralocorticoids) taken at home in pill form can replace the hormones (cortisol and, if needed, aldosterone) that your child’s body doesn’t make. We adjust the dose to your child’s needs, which change as your child grows. We also give hormones and other medicines by shot (injection) or intravenous (IV) line, if your child ever needs this in an emergency to balance their levels of hormones, sodium or potassium. We teach you what you need to know about cortisol replacement therapy (PDF) (Spanish) for daily life and emergencies.

Reconstructive surgery is an option for girls with classical CAH if their genitals are not typical. Not every family wants or needs this, but some do. Our team talks with you in detail about surgery options and the many factors to consider when thinking about surgery. Some parents opt to delay the choice until their child is old enough to help decide. If your family chooses surgery, we have experienced surgeons to plan and perform your child’s operation.

Seattle Children’s CAH team includes a psychologist and a social worker. Along with the rest of your team, they help your child and family find resources and cope with the stress and challenges of living with CAH.

A genetic counselor on the team helps families understand the genetic causes of CAH. They also explain the chances of the condition happening in another pregnancy. They can explain how other family members might be affected too.

Some effects of CAH can show up on the skin. Acne and unwanted hair are 2 examples. If these concerns affect your child, a Seattle Children’s dermatologist can evaluate your child’s needs and provide treatments to help.

CAH and its treatment can affect your child’s weight, salt levels and bone health. A nutritionist is on the team to help your family understand your child’s nutrition needs and make food choices that support your child’s long-term health.

We work closely with teens and young adults to prepare and empower them to take on a greater role in their own care. We’re committed to making sure that they are ready to enter the adult healthcare system and that they have the experienced providers they need. Seattle Children’s pediatric specialists partner with CAH experts from UW Medical Center to offer seamless care.

• Our CAH Program brings together board-certified specialists from many areas of healthcare — including endocrinology, urologic reconstructive surgery, neonatology, genetic counseling, gynecology and psychology — to provide the many types of care your child may need.
• Your child’s providers work as a team to understand how CAH affects your child. Then we plan and deliver care custom made for them.
• We have decades of experience working with families like yours. We can help — if you just learned your newborn has CAH, you have been searching for an accurate diagnosis for years or you have already had CAH treatment somewhere else.
• Our CAH care coordinator helps ensure you get the care and support you need. This nurse works closely with you and your child’s whole CAH team to identify concerns, set goals, provide care, evaluate results and teach your family about CAH.
• We offer a full range of care for CAH, including surgery for families who want or need it. Our expertise and services qualify us as a Level 1 Comprehensive Care Center. Level 1 means you can count on excellence in both medical care and surgical care here. The CARES Foundation has given this designation to only a handful of centers across the United States.
• Dr. Patricia Y. Fechner is the medical director of our CAH Program. She is a nationally recognized expert in CAH. She also serves as the Washington state endocrine newborn screening consultant. This means she consults with doctors around the state when their newborn patients test positive for CAH.
• Drs. Margarett Shnorhavorian and Mark Cain are surgical co-directors of our CAH Program. They are internationally recognized experts in surgical care for children with this condition. Together they have over 45 years of experience caring for children with the complex concerns linked to CAH.
• Many of our CAH team members are active in teaching other healthcare providers around the country about CAH and how to treat it — through lectures, presentations and trainings.

• Seattle Children’s provides comprehensive care for babies, children, teens and young adults with CAH. We also serve adults with CAH through our partnership with UW Medical Center. We partner with UW Medicine doctors who specialize in adult endocrinology, reproductive medicine and urology.
• As our young patients move through their teen years, we work closely with them to take on more responsibility for their own care. Our transition program prepares them for success in the adult healthcare system.
• If you or another close family member has CAH, chances may be higher that your baby will have it. Our team can talk with you about your risk, assess your baby if you are pregnant and help you understand the results.

• All members of your CAH team are here to support you and your family as you learn more about CAH and how to live the healthiest life. Comprehensive care goes beyond treatments like medicines and surgery. It’s also about helping you thrive.
• We make sure you have the information and guidance you need to understand CAH and take part fully in all care decisions.
• As challenges come up, we’re here to help you cope. A social worker and psychologist on the CAH team provide direct support around behavior and mental health. We also connect you with patient and family support groups and other resources in the community.
• Seattle Children’s hosts a CAH Family Day to bring together families affected by this condition. The event includes panel discussions, breakout sessions and fun activities.
• Each year we take part in a week-long gathering at Camp Korey for children with CAH.