Disease or Syndrome
pneumonitis Audio
pneu·mo·ni·tis [ noo-muh-nahy-tis, nyoo- ]
Definitions related to pneumonitis:
  • An inflammatory process affecting the lung parenchyma. It is a milder form of lung inflammation compared to pneumonia.
    NCI
    U.S. National Cancer Institute, 2021
  • Inflammation of the lung parenchyma.
    NICHD Pediatric Terminology
    U.S. National Cancer Institute, 2021
  • Inflammation of the lungs. This may be caused by disease, infection, radiation therapy, allergy, or irritation of lung tissue by inhaled substances.
    NCI Dictionary of Cancer Terms
    U.S. National Cancer Institute, 2021
  • A disorder characterized by inflammation focally or diffusely affecting the lung parenchyma.
    Common Terminology Criteria for Adverse Events
    U.S. National Institutes of Health, 2021
  • Pneumonitis (noo-moe-NIE-tis) is a general term that refers to inflammation of lung tissue. Technically, pneumonia is a type of pneumonitis because the infection causes inflammation. Pneumonitis, however, is usually used by doctors to refer to noninfectious causes of lung inflammation.
    Mayo Clinic
    Mayo Foundation for Medical Education and Research, 2025
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This content should not be used in place of medically-reviewed decision support reference material or professional medical advice. Some terms may have alternate or updated definitions not reflected in this set. The definitions on this page should not be considered complete or up to date.