On chest<unk> -ray, bronchial<unk>  tumor is characterized by the presence of round or oval opacities with sharp and notched margins, whereas thymic<unk>  tumor often demonstrates focal areas of necrosis or punctate calcifications.
Carcinoid syndrome chest x ray
Linitis plastica chest x ray
Pneumoconiosis chest x ray
Silicosis chest x ray
Chronic obstructive pulmonary disease chest x ray
Pulmonary nodule chest x ray
Bronchiolitis chest x ray
Chronic bronchitis chest x ray