| Abstract: | The X-ray appearances of 722 proved cases with primary lung adenocarcinoma were reviewed. 74.5% had typical X-ray findings: peripheral pulmonary nodule (less than 4 cm). Atypical X-ray manifestations were variable. 54 cases (29.2%) had airway obstruction (obstructive pneumonitis and atelectasis), (179.2%) had hilar and/or mediastinal adenopathy as the main finding, 87 (47.0%) had pulmonary mass greater than 4 cm in diameter, 22 (11.9%) had mass with single or multiple cavities, 4 had lesions mimicked pneumonitis and 1 case had trachea and main bronchi involvement. Of the 56 poorly differentiated adenocarcinoma, 88% (49 cases) had Various X-ray findings. There were 35 cases (71.4%) had big masses (greater than 4 cm in diameter) with 5-6 cm for 19 cases and more 6 cm for 13 cases. Most of the masses with sharp margin and prompt enlargement in short period. There were 2 cases of poorly differentiated adenocarcinoma with very big mediastinal adenopathy misdiagnosed as lymphoma. |
