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Disease Profile

Idiopathic acute eosinophilic pneumonia

Prevalence estimates on Rare Medical Network websites are calculated based on data available from numerous sources, including US and European government statistics, the NIH, Orphanet, and published epidemiologic studies. Rare disease population data is recognized to be highly variable, and based on a wide variety of source data and methodologies, so the prevalence data on this site should be assumed to be estimated and cannot be considered to be absolutely correct.

<1 / 1 000 000

US Estimated

Europe Estimated

Age of onset

All ages





Autosomal dominant A pathogenic variant in only one gene copy in each cell is sufficient to cause an autosomal dominant disease.


Autosomal recessive Pathogenic variants in both copies of each gene of the chromosome are needed to cause an autosomal recessive disease and observe the mutant phenotype.


dominant X-linked dominant inheritance, sometimes referred to as X-linked dominance, is a mode of genetic inheritance by which a dominant gene is carried on the X chromosome.


recessive Pathogenic variants in both copies of a gene on the X chromosome cause an X-linked recessive disorder.


Mitochondrial or multigenic Mitochondrial genetic disorders can be caused by changes (mutations) in either the mitochondrial DNA or nuclear DNA that lead to dysfunction of the mitochondria and inadequate production of energy.


Multigenic or multifactor Inheritance involving many factors, of which at least one is genetic but none is of overwhelming importance, as in the causation of a disease by multiple genetic and environmental factors.


Not applicable



Immune System Diseases; Lung Diseases


Idiopathic acute eosinophilic pneumonia (IAEP) is characterized by the rapid accumulation of eosinophils in the lungs. Eosinophils are a type of white blood cell and are part of the immune system.[1] IAEP can occur at any age but most commonly affects otherwise healthy individuals between 20 and 40 years of age. Signs and symptoms may include fever, cough, fatigue, difficulty breathing (dyspnea), muscle pain, and chest pain. IAEP can progress rapidly to acute respiratory failure.[1][2] The term “idiopathic” means the exact cause for the overproduction of eosinophils is not known. Possible triggers of acute eosinophilic pneumonia include cigarette smoking, occupational exposure to dust and smoke, and certain medications. [1] Diagnosis of IAEP generally involves a bronchoscopy and bronchoalveolar lavage (BAL).[1] Treatment with corticosteroids is effective in most cases. Because IAEP often progresses rapidly, respiratory failure can occur; in these cases, mechanical ventilation is required.[1][2][3]


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.

Medical Terms Other Names
Learn More:
80%-99% of people have these symptoms
Chest pain
Pulmonary infiltrates
Lung infiltrates
Respiratory insufficiency
Respiratory impairment
Restrictive ventilatory defect
Stiff lung or chest wall causing decreased lung volume
30%-79% of people have these symptoms
Abdominal pain
Pain in stomach
Stomach pain

[ more ]

Abnormal eosinophil morphology
Abnormal pattern of respiration
Abnormal respiratory patterns
Unusual breathing patterns

[ more ]

Abnormal pleura morphology
Muscle ache
Muscle pain

[ more ]



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.

Organizations Supporting this Disease

    Learn more

    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

    • The National Organization for Rare Disorders (NORD) has a report for patients and families about this condition. NORD is a patient advocacy organization for individuals with rare diseases and the organizations that serve them.

      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.
      • Orphanet is a European reference portal for information on rare diseases and orphan drugs. Access to this database is free of charge.
      • PubMed is a searchable database of medical literature and lists journal articles that discuss Idiopathic acute eosinophilic pneumonia. Click on the link to view a sample search on this topic.


        1. Cottin, Vincent. Acute Eosinophilic Pneumonia. National Organization of Rare Disorders (NORD). 2015; https://rarediseases.org/rare-diseases/acute-eosinophilic-pneumonia/. Accessed 3/23/2016.
        2. Dubus, Jean-Christophe. Idiopathic acute eosinophilic pneumonia. Orphanet. November, 2013; https://www.orpha.net/consor/cgi-bin/OC_Exp.php?lng=en&Expert=724. Accessed 3/23/2016.
        3. Wechsler, Michael. Eosinophilic Pneumonia. American Partnership for Eosinophilic Disorders (Apfed). https://apfed.org/about-ead/eosinophilic-pneumonia/. Accessed 3/23/2016.