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hormonal

Congenital adrenal hyperplasia

Photo of smiling little girl child standing isolated over yellow background. Looking camera.

Congenital adrenal hyperplasia (CAH) is a group of genetic disorders that affect the adrenal glands, leading to an imbalance of certain hormones, particularly cortisol and aldosterone. These conditions are present from birth (congenital) and are usually caused by mutations in specific genes that are involved in the production of adrenal hormones. The most common form of CAH is caused by a deficiency in the enzyme 21-hydroxylase. Here are key points to understand about congenital adrenal hyperplasia:

1. Adrenal Gland Function:

The adrenal glands, which are located on top of each kidney, play a vital role in producing hormones that regulate various bodily functions. These hormones include cortisol (a stress hormone), aldosterone (which helps regulate salt and water balance), and androgens (male sex hormones).

2. Types of Congenital Adrenal Hyperplasia:

The most common form of CAH is 21-hydroxylase deficiency. This condition results in a deficiency of cortisol and aldosterone and an excess of androgens.
Other less common forms of CAH include 11-beta-hydroxylase deficiency and 17-alpha-hydroxylase deficiency, each with its own set of symptoms and hormone imbalances.

3. Symptoms:

The severity of CAH can vary depending on the specific enzyme deficiency and its degree.
In 21-hydroxylase deficiency, symptoms in newborns and infants may include dehydration, poor feeding, vomiting, and failure to thrive.
As children with CAH grow older, they may develop signs of androgen excess, such as early appearance of pubic hair, rapid growth, and advanced bone age.
Girls with CAH may have ambiguous genitalia at birth due to exposure to excess androgens in the womb.

4. Diagnosis:

CAH is typically diagnosed through blood tests that measure hormone levels, such as cortisol and aldosterone, and genetic testing to identify the specific enzyme deficiency.

5. Treatment:

The primary treatment for CAH is hormone replacement therapy to restore normal hormone levels.
Children with CAH often require daily medications to replace cortisol and aldosterone. Adjustments in medication dosage are made based on regular monitoring of hormone levels.
Surgery may be needed for individuals with ambiguous genitalia to achieve a more typical appearance.

6. Long-Term Management:

Lifelong medical supervision is necessary to monitor hormone levels, ensure proper growth and development, and prevent complications.
Regular follow-up with pediatric endocrinologists and other specialists is essential.

7. Complications:

If left untreated or poorly managed, CAH can lead to life-threatening adrenal crises during periods of stress or illness.
Long-term complications may include growth problems, bone health issues, fertility problems, and psychological and social challenges.

8. Genetic Counseling:

Families affected by CAH may benefit from genetic counseling to understand the inheritance pattern of the condition and assess the risk of having affected children in future pregnancies.

Early diagnosis and comprehensive management by a multidisciplinary medical team, including pediatric endocrinologists, are crucial for children with congenital adrenal hyperplasia. Proper treatment can help children lead healthy lives and manage the hormonal imbalances associated with this condition.