Adrenal Hypoplasia
What is Adrenal Hypoplasia?
Adrenal hypoplasia is a rare condition where the adrenal glands are underdeveloped from birth. The adrenal glands sit on top of your kidneys and make essential hormones that control energy, stress response, and metabolism. When these glands do not form properly, they cannot produce enough hormones to keep your body functioning well.
The most common form is X-linked adrenal hypoplasia congenita, which affects mostly males. This genetic condition is caused by mutations in the DAX1 gene. Without proper adrenal function, your body struggles to manage stress, maintain blood pressure, and regulate salt and water balance.
People with adrenal hypoplasia need lifelong hormone replacement to stay healthy. Early detection through blood testing helps prevent serious complications like adrenal crisis, which can be life-threatening. Understanding your hormone levels is the first step toward managing this condition effectively.
Symptoms
- Extreme fatigue and weakness, even with adequate rest
- Low blood pressure that causes dizziness when standing
- Salt craving and dehydration from sodium loss
- Poor feeding and failure to gain weight in infants
- Vomiting and diarrhea that does not improve
- Darkening of the skin in some cases
- Low blood sugar episodes that cause shakiness or confusion
- Delayed puberty or lack of sexual development in boys
- Undescended testicles in male infants
Many infants with adrenal hypoplasia show symptoms within the first few weeks or months of life. Some milder cases may not become apparent until later childhood or adolescence. Early symptoms can be subtle and may be mistaken for common infant feeding problems.
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Causes and risk factors
Adrenal hypoplasia is most often caused by genetic mutations that affect adrenal gland development. The X-linked form results from mutations in the DAX1 gene, also called NR0B1. This gene provides instructions for making a protein essential for adrenal gland formation. Since the gene is on the X chromosome, males are much more likely to be affected because they have only one X chromosome.
Some cases occur as part of larger genetic syndromes or chromosomal abnormalities. Rarely, adrenal hypoplasia can develop without a clear genetic cause. Family history is an important risk factor, as the X-linked form passes from carrier mothers to their sons. Prenatal genetic testing can identify at-risk pregnancies when there is a known family history.
How it's diagnosed
Diagnosing adrenal hypoplasia requires blood tests to measure adrenal hormone levels. DHEA-Sulfate is a key biomarker that will be very low or absent in people with this condition. DHEA-S is produced by the adrenal glands, so underdeveloped adrenal tissue cannot make normal amounts. Testing also includes cortisol, ACTH, aldosterone, and electrolytes to assess how well the adrenal glands are functioning.
Rite Aid offers DHEA-Sulfate testing as part of our flagship panel, available at Quest Diagnostics locations nationwide. Getting tested helps identify hormone deficiencies early so treatment can begin promptly. Genetic testing can confirm specific mutations like DAX1 and provide information for family planning. Imaging studies may show small or absent adrenal glands.
Treatment options
- Hormone replacement therapy with hydrocortisone to replace missing cortisol
- Fludrocortisone to replace aldosterone and manage salt balance
- Salt supplements, especially in infants and young children
- Testosterone replacement therapy starting at puberty for males
- Increased medication doses during illness, injury, or surgery to prevent adrenal crisis
- Medical alert bracelet to inform emergency responders about adrenal insufficiency
- Regular blood tests to monitor hormone levels and adjust medication doses
- Emergency injectable hydrocortisone kit for severe illness or stress
- Coordination with an endocrinologist for specialized ongoing care
Concerned about Adrenal Hypoplasia? Get tested at Rite Aid.
- Simple blood draw at your nearest lab
- Results in days, not weeks
- Share results with your doctor
Frequently asked questions
Adrenal hypoplasia is a structural problem where the adrenal glands are underdeveloped from birth. Adrenal insufficiency is the functional result, meaning the glands cannot produce enough hormones. Adrenal hypoplasia causes adrenal insufficiency, but adrenal insufficiency can also result from other conditions like autoimmune disease or infections.
There is currently no cure for adrenal hypoplasia because the underdeveloped glands cannot regenerate. However, the condition can be managed very effectively with hormone replacement therapy. People with adrenal hypoplasia can live full, healthy lives with proper treatment and monitoring. Lifelong medical care and medication are necessary.
X-linked adrenal hypoplasia follows an X-linked recessive pattern. Mothers who carry one mutated DAX1 gene usually have no symptoms but can pass the mutation to their children. Sons who inherit the mutation will develop the condition. Daughters who inherit it become carriers like their mothers.
An adrenal crisis is a life-threatening emergency when cortisol levels drop too low during stress or illness. Symptoms include severe vomiting, confusion, very low blood pressure, and shock. Prevent crisis by increasing medication doses during illness and keeping an emergency injectable hydrocortisone kit available. Seek immediate medical care if symptoms develop.
DHEA-Sulfate is made almost exclusively by the adrenal glands. Very low or absent DHEA-S levels indicate that adrenal tissue is not functioning properly. This makes DHEA-S testing valuable for detecting adrenal hypoplasia and monitoring adrenal function over time.
Boys with X-linked adrenal hypoplasia often have delayed or absent puberty without treatment. The condition affects not only adrenal function but also the development of cells that produce testosterone. Testosterone replacement therapy starting at the normal age of puberty allows for normal sexual development and maturation.
Testing frequency depends on age, treatment stability, and overall health. Infants and children may need testing every few months as they grow and medication doses change. Adults on stable treatment typically need testing once or twice per year. Your doctor may order more frequent tests during dose adjustments or if symptoms develop.
Physical stress from illness, injury, or surgery increases your body's need for cortisol. People with adrenal hypoplasia cannot increase cortisol production naturally. Without increasing medication doses during stress, dangerous cortisol deficiency can occur. Always follow your doctor's stress-dosing instructions.
A balanced diet supports overall health, but diet alone cannot replace missing hormones. Many people with adrenal hypoplasia need extra salt in their diet, especially young children. Eating regular meals helps prevent low blood sugar. Work with your healthcare team to develop a nutrition plan that supports your treatment.
Inform school nurses and teachers about your child's condition and emergency care needs. Provide written instructions for recognizing adrenal crisis symptoms and administering emergency hydrocortisone. Keep emergency medication at school in a clearly labeled kit. Create a care plan that covers illness management and stress-dosing during school activities.