Pneumonic-type mucinous lung adenocarcinoma diagnosed by transbronchial cryobiopsy

Abstract

Primary lung adenocarcinoma with lepidic growth can mimic diffuse pulmonary parenchymal processes like infectious pneumonia or idiopathic inflammatory pneumonitis. We report a case of subacute pneumonitis refractory to antibiotic therapy and empirical corticosteroids, proven to be diffuse mucinous adenocarcinoma with lepidic growth on transbronchial cryobiopsy. Subacute pneumonitis presentation of unsuspected lung adenocarcinoma with lepidic growth. The diagnosis was made by transbronchial lung cryobiopsy.