The clinical presentation (fever, cough, purulent sputum, pleuritic pain) combined with the radiological findings (dense, homogenous opacity, air bronchogram, obscuring the right hemidiaphragm due to the silhouette sign) in a specific lobe is highly characteristic of lobar pneumonia, typically caused by bacterial infection (e.g., Streptococcus pneumoniae). Pleural effusion would show a meniscus sign and blunting of costophrenic angles. Atelectasis would typically show volume loss. A lung abscess would present as a cavitating lesion with an air-fluid level.
Sign up free to access AI-powered MCQ practice with detailed explanations and adaptive learning.