it has been suggested by several authors that so called 'primary ' pulmonary hypertension may have an 'autoimmune ' basis because of the clinical association of this condition with raynaud 's phenomenon , polyarthritis and its not infrequent association with other conditions affecting connective tissue , such as progressive systemic sclerosis ( pss ) and systemic lupus erythematosus ( sle ) , often in the absence of pulmonary parenchymal disease .
C0004364
autoimmune
C0024141
systemic lupus erythematosus