 
         
         
         ABSTRACT
         
         Thoracic manifestations of the rheumatic diseases (RDs) are a significant cause of
            morbidity and mortality worldwide. The five RDs most frequently associated with pleuropulmonary
            disease are (1) rheumatoid arthritis (RA), (2) systemic lupus erythematosus (SLE),
            (3) progressive systemic sclerosis (PSS), (4) polymyositis/dermatomyositis (PM/DM),
            and (5) Sjögren syndrome (SS). The clinical presentation is highly variable, ranging
            from pleuritic pain alone to slowly progressive breathlessness accompanied by cough.
            On occasion RD may present acutely with overwhelming respiratory failure as the first
            pulmonary manifestation. In all of the RDs, the pathology is dominated by either or
            both inflammation and fibrosis, but the anatomical distribution in each varies somewhat.
            For example, airway-associated lymphoid hyperplasia is a common manifestation of SS,
            PM/DM preferentially involves the alveolar parenchyma, and pleural inflammation is
            most commonly seen in RA. Such changes may be detected radiologically as peribronchovascular
            disease in SS, ground-glass infiltrates in PM/DM, and pleural disease with effusion
            in RA. Some RDs are more commonly associated with distinctive histopathology, such
            as rheumatoid nodules in RA, or lymphoid hyperplasia in both RA and SS. Patients with
            PSS are at particular risk for pulmonary hypertension when the lung is involved. Also,
            statistically, acute lung injury occurs more commonly in some, such as SLE and PM/DM.
            The very common use of immunosuppressive agents in the treatment of RD creates additional
            diagnostic problems related to drug toxicity and infection. Finally, a major confounding
            factor occurs when preclinical RD presents first as pulmonary disease (particularly
            PM/DM), an occurrence that may invoke one of the so-called idiopathic interstitial
            pneumonias. The most common pleuropulmonary pathological manifestations of the five
            major RDs are presented and discussed with brief radiological correlations.
         
         
         
            
KEYWORDS
         
         
            Lung - pathology - collagen vascular diseases - rheumatic
          
      
    
   
      
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Kevin O LeslieM.D. 
            Department of Laboratory Medicine and Pathology, Mayo Clinic Arizona
            
            13400 E. Shea Blvd., Scottsdale, AZ 85259
            
            Email: leslie.kevin@mayo.edu