[Collageno-vascular diseases and interstitial pulmonary fibrosis. An analysis of diagnostic tests].

: Collagenovascular diseases, particularly rheumatoid arthritis, LES and scleroderma frequently involve the lung. A group of 15 patients with collagen vasculopathies was analysed with a view to identifying the most suitable invasive and noninvasive tests for the diagnosis of the interstitial fibrosis of the lung that often accompanies such disorders. Among the noninvasive tests only the respiratory function tests (especially DLCO) are adequately sensitive, while chest X-rays, gallium scintigraphy of the lung and ACE are relatively unreliable. Bronchoalveolar lavage is often altered (though the intensity varies considerably) and transbronchial biopsy appears to be the ideal diagnostic examination.