TABLE 1

Multidisciplinary diagnosis of patients pathologically unclassifiable by surgical lung biopsy

Cases n
 Number of surgical lung biopsies performed: 849
 Number of non-diagnostic biopsies: 2
 Number with pathologic diagnosis of “fibrosing interstitial pneumonia: unclassifiable”: 41
Final multidisciplinary diagnosis n
 Unclassifiable: 19
 Idiopathic pulmonary fibrosis: 8
 Chronic hypersensitivity pneumonia: 5
 Autoimmune connective tissue disease: 4
 Smoking-related interstitial lung disease: 2
 Infection (Mycobacterium avium): 1
 Sarcoidosis: 1
 Idiopathic nonspecific interstitial pneumonia: 1