c diffuse interstitial lung diseases?Nasopharyngeal carcinoma? Carcinoma of the lungРChronic Interstitial Lung DiseasesРClinical history lasting months or years?Slowly increasing respiratory insufficiency, dyspnea, cough and finger-clubbing?Interstitial fibrosis, infiltration with lymphocytes and macrophages.?Fibrosing diseases?Granulomatous diseasesРFibrosing diseases?Idiopathic pulmonary fibrosis (IPF)РUnknown etiology?Diffuse interstitial fibrosis?Usual interstitial pneumonia?The pleural surfaces have the appearance of cobblestonesРIdiopathic pulmonary fibrosisРFibrosis?Lower lobesРUsual interstitial pneumoniaРSarcoidosisРThe etiology remains unknown?< 40 years old?Danish and Swedish?Several immunologic abnormalities?NonsmokersРMorphologyРNoncaseating epithelioid granulomaРAsteroid body