Sibaja Campos, MarioMonge Bonilla, Cecilia2017-07-052017-07-0520152215-2741http://hdl.handle.net/20.500.11764/644ARTICULOCryptogenic organizing pneumonia (COP) is a distinct histopathologic entity characterized by Masson bodies which are intraalveolar buds of granulation tissue; consisting of connective tissue and myofibroblasts. This pathologic pattern when present with the characteristic imaging and clinical features of COP defines the diagnosis of the disease. A specific etiology is not found. Treatment with corticosteroids results in a rapid clinical and imaging improvement but unfortunately relapses are common upon decreasing the dose or stopping the treatment. This case report describes a typical case of COP with the characteristic Improvement with corticosteroid therapy and relapse upon treatment taper.enNEUMONIA EN ORGANIZACION CRIPTOGENICACOSTA RICAFIBROSISArticle