Speaker's Highlight

• Don Sin University of British Columbia, St. Paul Hospital (Canada)
  Kenneth R. Chapman Toronto General Hospital Research Institute (Canada)
• Parameswaran Nair McMaster University (Canada)
  Carolyn Calfee UCSF (U.S.A.)
• Gregory P. Downey University of Colorado School of Medicine (U.S.A.)
  David A. Schwartz University of Colorado School of Medicine (U.S.A.)
• Neil Schluger Tuberculosis Control Branch, California Department of Public Health (U.S.A.)
  Nick Kim Critical Care & Sleep Medicine, University of California San Diego (U.S.A.)
• Nicola Hananiah Baylor College of Medicine (U.S.A.)
  Jae-Joon Yim Seoul National University College of Medicine (Republic of Korea)
• Koichiro Asano Tokai University School of Medicine (Japan)
  Diahn-Warng Perng Taipei Veterans General Hospital (Taiwan)
• Konstantinos Kostikas University of Ioannina (Greece)
  Karin Klooster University Medical Center Groningen (Kingdom of the Netherlands)

• Pulmonary Manifestations of Rheumatoid Arthritis

  Rheumatoid arthritis (RA) is best known for persistent joint inflammation, morning stiffness and progressive damage, yet its effects can extend well beyond the musculoskeletal system. The lungs, pleura, airways and pulmonary blood vessels may all be involved, sometimes before significant joint symptoms appear. Recognising these patterns early can protect respiratory function and guide safer rheumatology treatment.

  For people living in Australia, this issue has practical importance across metropolitan and regional settings. A patient in Melbourne may have rapid access to high-resolution CT, while someone in rural Queensland may travel considerable distances for respiratory review. Smoking history, bushfire smoke, workplace dust and vaccination status can also influence how breathlessness is assessed.

  How Rheumatoid Arthritis Affects The Lungs

  The most recognised pulmonary complication is interstitial lung disease (RA-ILD), in which inflammation and scarring develop in the tissue surrounding the air sacs. Usual interstitial pneumonia and nonspecific interstitial pneumonia are common radiological patterns. Patients may report exertional breathlessness, a dry cough or declining exercise tolerance, although early disease can be silent.

  RA can also cause pleural thickening, pleural effusions and rheumatoid nodules within the lung. Small-airway disease, including constrictive bronchiolitis and bronchiectasis, may lead to wheezing, recurrent infections or persistent sputum production. Pulmonary hypertension is less common but clinically important, particularly when breathlessness seems disproportionate to changes seen on lung imaging.

  Symptoms That Deserve Assessment

  A new dry cough, reduced walking distance, unexplained fatigue or shortness of breath when climbing stairs should not automatically be attributed to ageing, reduced fitness or joint pain. Fine “Velcro-like” crackles at the lung bases can suggest interstitial involvement, while clubbing or low oxygen levels may indicate more advanced disease.

  Symptoms may overlap with asthma, chronic obstructive pulmonary disease, heart disease, infection and medication toxicity. Australian clinicians also need to consider exposure to dust in mining, farming and construction, along with smoke from seasonal bushfires. A detailed history should cover smoking, vaping, mould, occupational exposure, previous tuberculosis risk and the timing of symptoms against RA treatment.

  Testing And Monitoring

  Initial evaluation commonly includes spirometry, lung volumes and diffusing capacity for carbon monoxide. A fall in forced vital capacity or diffusing capacity over time may signal progression, even when symptoms appear stable. Resting and exertional oxygen saturation can reveal impairment that is missed during a short consultation.

  High-resolution computed tomography is more sensitive than a standard chest X-ray for identifying fibrosis, ground-glass change, bronchiectasis and rheumatoid nodules. Echocardiography may be appropriate when pulmonary hypertension or cardiac disease is suspected. In Australia, access to these investigations can vary between public hospitals, private imaging services and regional networks, so shared care between a general practitioner, rheumatologist and respiratory physician is often valuable.

  Treatment Decisions And Medication Safety

  Management depends on the pattern and severity of lung disease. Smoking cessation, pulmonary rehabilitation, exercise within safe limits and prompt treatment of respiratory infections form the foundation of care. Some patients require supplemental oxygen, while progressive fibrotic disease may lead to consideration of antifibrotic therapy under specialist supervision.

  Disease-modifying antirheumatic drugs (DMARDs) require individual assessment rather than automatic discontinuation. Methotrexate-related pneumonitis, for example, is uncommon but potentially serious, and new respiratory symptoms need prompt review. Biologic and targeted therapies may reduce systemic inflammation, though infection risk and pre-existing lung disease must be considered. Australian prescribing and subsidy arrangements, including Therapeutic Goods Administration approval and Pharmaceutical Benefits Scheme criteria, can affect access and treatment selection.

  Infection Prevention And Everyday Protection

  People with RA-related lung disease may be more vulnerable to respiratory infections because of altered lung structure and immune-modifying medication. Influenza vaccination, COVID-19 vaccination and pneumococcal protection should be reviewed according to age, risk factors and the Australian Immunisation Handbook. Practical information about pneumococcal vaccination can support a discussion with a treating clinician.

  Avoiding cigarette smoke is essential, and vaping should not be considered harmless for someone with inflammatory or fibrotic lung disease. During periods of poor air quality, checking local alerts and reducing strenuous outdoor activity can help. This is particularly relevant in Canberra, Sydney and regional New South Wales during bushfire seasons, when fine particulate matter can aggravate cough and breathlessness.

  Coordinated Care And Long-Term Outlook

  RA-associated lung disease often needs ongoing review rather than a single test or appointment. Stable patients may have lung function checks at intervals determined by their symptoms, imaging and treatment risk. A meaningful decline in exercise capacity, oxygen saturation or pulmonary function should prompt reassessment and, where appropriate, repeat imaging.

  A multidisciplinary approach brings together rheumatology, respiratory medicine, radiology, physiotherapy and primary care. Patients should keep an accurate medication list and report fever, rapidly worsening breathlessness, chest pain, coughing blood or a sudden fall in exercise tolerance. Emergency assessment is warranted for severe or rapidly developing symptoms.

  The outlook varies widely. Some people have mild, stable abnormalities, while others develop progressive pulmonary fibrosis or recurrent airway infections. Early recognition, careful medication review, vaccination, smoke avoidance and regular monitoring can preserve independence and help clinicians balance control of joint inflammation with respiratory safety.

  At the next rheumatology or general practice appointment, request a documented respiratory baseline with lung function testing, vaccination review and referral for high-resolution CT or respiratory assessment when symptoms or examination findings warrant it.

  Richard Russell Nuffield Department of Clinical Medicine, University of Oxford (United Kingdom)
• Mona Bafadhel King’s College London (United Kingdom)
  David Jackson Guy’s and St Thomas’ Hospital, King’s College London (United Kingdom)
• James Chalmers University of Dundee (United Kingdom)
  David Price University of Aberdeen (United Kingdom)