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Pulmonology21 papers

Pneumonitis

Last edited: 4/14/2026

Overview

Pneumonitis refers to inflammation of lung tissue, which can result from various causes including immunotherapy, drug reactions, environmental exposures, and viral/bacterial infections. It presents with respiratory symptoms and can range from mild to life-threatening depending on the etiology and severity. 134567

Diagnosis

  • Clinical Presentation: Fever, cough, dyspnea, and radiological findings such as ground-glass opacities.
  • Imaging: Chest CT scans often reveal characteristic patterns (e.g., ground-glass opacities, consolidation).
  • Laboratory Tests: Elevated inflammatory markers (e.g., CRP, ESR).
  • Specific Testing:
  • - Immunotherapy-related: Consider viral testing for COVID-19 to rule out concurrent infection 1. - Drug-induced: Consider specific drug levels and discontinuation if suspected (e.g., amiodarone, nitrofurantoin). - Infectious Causes: PCR, cultures, and serology for suspected pathogens (e.g., Legionella, HHV-6) 5.
  • Special Imaging: Gallium-67 scintigraphy may indicate amiodarone-induced pneumonitis 6.
  • Management

  • First-line Treatments:
  • - Steroids: High-dose corticosteroids (e.g., prednisone 1-2 mg/kg/day) are often initial therapy 15. - Immunosuppression: For steroid-refractory cases, consider second-line agents like infliximab, mycophenolate mofetil, or other immunosuppressive therapies 1.
  • Adjunctive Treatments:
  • - Antibiotics: For suspected bacterial co-infections (e.g., Legionella) 5. - Supportive Care: Oxygen therapy, mechanical ventilation if respiratory failure occurs.
  • Drug-specific Management:
  • - Amiodarone: Discontinue if pneumonitis is suspected 36. - Nitrofurantoin: Discontinue immediately and consider alternative antibiotics 7.

    Special Populations

  • Elderly: Increased susceptibility to severe forms, particularly with drug-induced pneumonitis 34.
  • Comorbidities: Presence of underlying lung disease or immunosuppression may exacerbate pneumonitis severity 15.
  • Key Recommendations

  • Multidisciplinary Approach: Utilize input from medical oncology, pulmonology, infectious disease, and radiology for diagnosis and management of immune-related pneumonitis, especially during the COVID-19 pandemic (Evidence: Expert opinion) 1.
  • Early Viral Testing: Perform early COVID-19 testing to differentiate from IR-pneumonitis in patients with overlapping symptoms (Evidence: Expert opinion) 1.
  • Steroid Therapy: Initiate high-dose corticosteroids for suspected immune-related pneumonitis (Evidence: Expert opinion) 15.
  • Monitor Drug Levels: For drug-induced pneumonitis, monitor and consider discontinuation of offending agents like amiodarone or nitrofurantoin (Evidence: Expert opinion) 37.
  • Consider Gallium-67 Scintigraphy: Use Gallium-67 scans for early detection of amiodarone-induced pneumonitis (Evidence: Weak) 6.
  • References

    1 Naidoo J, Reuss JE, Suresh K, Feller-Kopman D, Forde PM, Mehta Steinke S et al.. Immune-related (IR)-pneumonitis during the COVID-19 pandemic: multidisciplinary recommendations for diagnosis and management. Journal for immunotherapy of cancer 2020. link 2 . Pneumonitis and non steroidal antiandrogens. Prescrire international 2003. link 3 Polkey MI, Wilson PO, Rees PJ. Amiodarone pneumonitis: no safe dose. Respiratory medicine 1995. link90254-6) 4 Seidal K, Jörgensen N, Elinder CG, Sjögren B, Vahter M. Fatal cadmium-induced pneumonitis. Scandinavian journal of work, environment & health 1993. link 5 Russler SK, Tapper MA, Knox KK, Liepins A, Carrigan DR. Pneumonitis associated with coinfection by human herpesvirus 6 and Legionella in an immunocompetent adult. The American journal of pathology 1991. link 6 van Rooij WJ, van der Meer SC, van Royen EA, van Zandwijk N, Darmanata JI. Pulmonary gallium-67 uptake in amiodarone pneumonitis. Journal of nuclear medicine : official publication, Society of Nuclear Medicine 1984. link 7 Averbuch SD, Yungbluth P. Fatal pulmonary hemorrhage due to nitrofurantoin. Archives of internal medicine 1980. link

    Original source

    1. [1]
      Immune-related (IR)-pneumonitis during the COVID-19 pandemic: multidisciplinary recommendations for diagnosis and management.Naidoo J, Reuss JE, Suresh K, Feller-Kopman D, Forde PM, Mehta Steinke S et al. Journal for immunotherapy of cancer (2020)
    2. [2]
      Pneumonitis and non steroidal antiandrogens. Prescrire international (2003)
    3. [3]
      Amiodarone pneumonitis: no safe dose.Polkey MI, Wilson PO, Rees PJ Respiratory medicine (1995)
    4. [4]
      Fatal cadmium-induced pneumonitis.Seidal K, Jörgensen N, Elinder CG, Sjögren B, Vahter M Scandinavian journal of work, environment & health (1993)
    5. [5]
      Pneumonitis associated with coinfection by human herpesvirus 6 and Legionella in an immunocompetent adult.Russler SK, Tapper MA, Knox KK, Liepins A, Carrigan DR The American journal of pathology (1991)
    6. [6]
      Pulmonary gallium-67 uptake in amiodarone pneumonitis.van Rooij WJ, van der Meer SC, van Royen EA, van Zandwijk N, Darmanata JI Journal of nuclear medicine : official publication, Society of Nuclear Medicine (1984)
    7. [7]
      Fatal pulmonary hemorrhage due to nitrofurantoin.Averbuch SD, Yungbluth P Archives of internal medicine (1980)

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