How do I know if I have Alpha 1-antitrypsin deficiency?

Alpha 1-antitrypsin deficiency (AATD) is a genetic condition that causes a shortage of a protective protein in the blood, often leading to lung and liver disease. You can determine if you have Alpha 1-antitrypsin deficiency through a simple blood test that measures your AAT protein levels and, if necessary, confirms your genetic genotype.

What are the early signs of Alpha 1-antitrypsin deficiency?

Because Alpha 1-antitrypsin deficiency often goes undiagnosed for years, it is important to recognize the subtle patterns in your health. Early symptoms often involve the lungs, such as unexplained shortness of breath during physical activity, a chronic cough, or frequent chest infections. In some individuals, particularly children or adults with liver involvement, symptoms may include jaundice (yellowing of the skin or eyes), abdominal swelling, or unexplained elevated liver enzymes. If you have a family history of emphysema—especially if it occurred in a non-smoker or at a young age (under 50)—this is a significant clinical indicator that warrants investigation for Alpha 1-antitrypsin deficiency.

How do I know if I should speak to my doctor?

You should consider discussing Alpha 1-antitrypsin deficiency with your primary care physician if you have persistent respiratory issues that do not respond to typical asthma or allergy treatments. It is helpful to prepare a clear summary of your health history. When you speak to your doctor, be specific: "I am concerned about my chronic respiratory symptoms and would like to be screened for Alpha 1-antitrypsin deficiency, as I understand it is a genetic condition that can be easily missed." Providing your physician with a family history of liver disease or early-onset lung disease can also help them prioritize this testing.

What diagnostic tests are used to confirm the condition?

The diagnostic process is straightforward and typically involves two primary steps to confirm Alpha 1-antitrypsin deficiency:

• Quantitative blood test: This measures the actual level of the AAT protein in your blood to see if it falls below the normal range.


• Genotyping (Phenotyping): This laboratory test identifies your specific genetic variants (such as the Z or S alleles) to confirm if you carry the mutations associated with Alpha 1-antitrypsin deficiency.

When should I seek urgent medical evaluation?

While many people live with Alpha 1-antitrypsin deficiency for years, certain "red flags" require immediate attention. Seek urgent care if you experience sudden, severe difficulty breathing, chest pain, coughing up blood, or sudden onset of jaundice. These can indicate acute complications that require prompt stabilization, regardless of whether you have a formal diagnosis of Alpha 1-antitrypsin deficiency yet.

How can I advocate for myself if my concerns are dismissed?

If your symptoms are dismissed, remember that you are the primary expert on your own body. If your doctor is hesitant to screen for Alpha 1-antitrypsin deficiency, ask them to document their refusal in your medical record or request a referral to a pulmonologist or a hepatologist (liver specialist). Often, specialists are more familiar with the screening protocols for rare genetic conditions. You can also point them to resources from the Alpha-1 Foundation, which provides clinical guidelines for healthcare providers.

Next steps

• Consult your primary care physician to request a serum AAT level blood test.


• Join our community of 339 people with Alpha 1-antitrypsin deficiency at DiseaseMaps.org to share experiences and find support.


• Document your family medical history, specifically noting any relatives with lung or liver disease.


• Visit the Alpha-1 Foundation website to download educational materials to share with your healthcare provider.

Medical disclaimer: This information is for educational purposes only and does not replace professional medical advice, diagnosis, or treatment; always seek the advice of your physician regarding a medical condition.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Alpha-1 antitrypsin deficiency.


• Orphanet: Alpha-1 antitrypsin deficiency (ORPHA:99908).


• Alpha-1 Foundation: Clinical Practice Guidelines for the Diagnosis and Management of Alpha-1 Antitrypsin Deficiency.


• OMIM (Online Mendelian Inheritance in Man): Alpha-1-Antitrypsin Deficiency (#613490).