Bronchioloalveolar carcinoma is a bronchogenic carcinoma that presents an insidious growth, arises from the walls of the distal air spaces and spreads using the alveolar septa as a stroma, preserving the lung architecture. In this work we analyze the high-resolution computed tomography of 17 patients with bronchioloalveolar carcinoma. Conversely to the data presented in the literature, male preponderance (71%) and a higher frequency of association between multinodular and consolidation patterns (53%) in comparison to single nodular (12%), multinodular (12%) and consolidation (23%) patterns were observed. The most common findings were: consolidation areas (76%), air bronchogram (71%), low attenuation areas (60%), thickening of interlobular septa, ground-glass attenuation and confluent nodules (54% each), and crazy paving pattern (36%). Cavitated nodules, atelectasis, halo sign and "tree in bud" pattern were observed in only one case each.

Keywords: Bronchioloalveolar, Carcinoma, High-resolution computed tomography

Pulmonary disease in paracoccidioidomycosis is very common and in some cases can be the sole manifestation of the disease. We studied the findings observed in 30 patients with pulmonary paracoccidioidomycosis submitted to high-resolution computed tomography in order to determine the most frequent findings, presentation patterns and distribution of paracoccidioidomycosis lesions in the lungs. The most frequent findings observed on high-resolution computed tomography were: interlobular septal thickening (96.7%), ground-glass opacities (66.7%), nodules (60%), irregular air-space enlargement (56.7%), bronchial wall thickening (46.7%), pleural thickening (36.7%), cavitation (36.7%), tracheal dilatation (33.3%), architectural distortion (30%), air-space consolidation (30%), parenchymal bands (23.3%), intralobular reticulate (13.3%) and hilar interstitial thickening (10%). Chest X-rays allow limited evaluation of diffuse pulmonary diseases, and hence high-resolution computed tomography is an essential method for studying patients with pulmonary paracoccidioidomycosis.

Keywords: Paracoccidioidomycosis, High-resolution computed tomography, Pulmonary mycosis