National Center for Advancing and Translational Sciences Genetic and Rare Diseases Information Center, a program of the National Center for Advancing and Translational Sciences

Primary spontaneous pneumothorax



Other Names:
Familial spontaneous pneumothorax; Spontaneous pneumothorax

Primary spontaneous pneumothorax is an abnormal accumulation of air in the pleural space (the space between the lungs and the chest cavity) that can result in the partial or complete collapse of a lung. It is called primary because it occurs in the absence of lung disease such as emphysema and spontaneous because the pneumothhorax was not caused by an injury such as a rib fracture. Primary spontaneous pneumothorax is likely caused by the formation of small sacs of air (blebs) in lung tissue that rupture, causing air to leak into the pleural space. This air creates pressure on the lung and can lead to its collapse. Symptoms may include chest pain on the side of the collapsed lung and shortness of breath. The blebs that lead to primary spontaneous pneumothorax may be present in an individual's lung (or lungs) for a long time before they rupture. A change in air pressure or a very sudden deep breath may cause a rupture to occur. In most cases, there are no prior signs of illness. Once a bleb ruptures and causes a pneumothorax, rates for recurrence may be as high as 13 to 60 percent.[1] Many researchers believe that genetic factors may play a role in the development of primary spontaneous pneumothorax.[2] In rare cases, the condition can be caused by mutations in the FLCN gene. In these cases, the condition follows an autosomal dominant pattern of inheritance.[1] In addition, several genetic disorders have been linked to primary spontaneous pneumothorax, including Marfan syndrome, homocystinuria, and Birt-Hogg-Dube syndrome.[2]
Last updated: 6/17/2015

This table lists symptoms that people with this disease may have. For most diseases, symptoms will vary from person to person. People with the same disease may not have all the symptoms listed. This information comes from a database called the Human Phenotype Ontology (HPO) . The HPO collects information on symptoms that have been described in medical resources. The HPO is updated regularly. Use the HPO ID to access more in-depth information about a symptom.

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Medical Terms Other Names
Learn More:
HPO ID
Percent of people who have these symptoms is not available through HPO
Autosomal dominant inheritance 0000006
Incomplete penetrance 0003829
Spontaneous pneumothorax
Spontaneous collapsed lung
0002108
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Last updated: 7/1/2020

Making a diagnosis for a genetic or rare disease can often be challenging. Healthcare professionals typically look at a person’s medical history, symptoms, physical exam, and laboratory test results in order to make a diagnosis. The following resources provide information relating to diagnosis and testing for this condition. If you have questions about getting a diagnosis, you should contact a healthcare professional.

Testing Resources

  • The Genetic Testing Registry (GTR) provides information about the genetic tests for this condition. The intended audience for the GTR is health care providers and researchers. Patients and consumers with specific questions about a genetic test should contact a health care provider or a genetics professional.

If you need medical advice, you can look for doctors or other healthcare professionals who have experience with this disease. You may find these specialists through advocacy organizations, clinical trials, or articles published in medical journals. You may also want to contact a university or tertiary medical center in your area, because these centers tend to see more complex cases and have the latest technology and treatments.

If you can’t find a specialist in your local area, try contacting national or international specialists. They may be able to refer you to someone they know through conferences or research efforts. Some specialists may be willing to consult with you or your local doctors over the phone or by email if you can't travel to them for care.

You can find more tips in our guide, How to Find a Disease Specialist. We also encourage you to explore the rest of this page to find resources that can help you find specialists.

Healthcare Resources


Research helps us better understand diseases and can lead to advances in diagnosis and treatment. This section provides resources to help you learn about medical research and ways to get involved.

Clinical Research Resources

  • ClinicalTrials.gov lists trials that are related to Primary spontaneous pneumothorax. Click on the link to go to ClinicalTrials.gov to read descriptions of these studies.

    Please note: Studies listed on the ClinicalTrials.gov website are listed for informational purposes only; being listed does not reflect an endorsement by GARD or the NIH. We strongly recommend that you talk with a trusted healthcare provider before choosing to participate in any clinical study.

Support and advocacy groups can help you connect with other patients and families, and they can provide valuable services. Many develop patient-centered information and are the driving force behind research for better treatments and possible cures. They can direct you to research, resources, and services. Many organizations also have experts who serve as medical advisors or provide lists of doctors/clinics. Visit the group’s website or contact them to learn about the services they offer. Inclusion on this list is not an endorsement by GARD.


These resources provide more information about this condition or associated symptoms. The in-depth resources contain medical and scientific language that may be hard to understand. You may want to review these resources with a medical professional.

Where to Start

  • Genetics Home Reference (GHR) contains information on Primary spontaneous pneumothorax. This website is maintained by the National Library of Medicine.
  • MedlinePlus was designed by the National Library of Medicine to help you research your health questions, and it provides more information about this topic.

In-Depth Information

  • Medscape Reference provides information on this topic. You may need to register to view the medical textbook, but registration is free.
  • The Monarch Initiative brings together data about this condition from humans and other species to help physicians and biomedical researchers. Monarch’s tools are designed to make it easier to compare the signs and symptoms (phenotypes) of different diseases and discover common features. This initiative is a collaboration between several academic institutions across the world and is funded by the National Institutes of Health. Visit the website to explore the biology of this condition.
  • Online Mendelian Inheritance in Man (OMIM) is a catalog of human genes and genetic disorders. Each entry has a summary of related medical articles. It is meant for health care professionals and researchers. OMIM is maintained by Johns Hopkins University School of Medicine. 

Questions sent to GARD may be posted here if the information could be helpful to others. We remove all identifying information when posting a question to protect your privacy. If you do not want your question posted, please let us know.


  1. Primary spontaneous pneumothorax. Genetics Home Reference (GHR). November 2012; http://ghr.nlm.nih.gov/condition/primary-spontaneous-pneumothorax. Accessed 6/17/2015.
  2. Daley BJ. Pneumothorax. Medscape Reference. April 28, 2014; http://emedicine.medscape.com/article/424547-overview. Accessed 6/17/2015.