RT Journal Article SR Electronic T1 Cryptogenic organising pneumonia JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 422 OP 446 DO 10.1183/09031936.06.00013505 VO 28 IS 2 A1 J-F. Cordier YR 2006 UL http://erj.ersjournals.com/content/28/2/422.abstract AB Organising pneumonia is defined histopathologically by intra-alveolar buds of granulation tissue, consisting of intermixed myofibroblasts and connective tissue. Although nonspecific, this histopathological pattern, together with characteristic clinical and imaging features, defines cryptogenic organising pneumonia when no cause or peculiar underlying context is found. Rapid clinical and imaging improvement is obtained with corticosteroid treatment, but relapses are common after stopping treatment. SERIES “RARE INTERSTITIAL LUNG DISEASES” Edited by C. Vogelmeier and U. Costabel Number 3 in this Series