Cavitation on chest imaging is most commonly associated with which conditions?

• A. Pneumonia
• B. Pleural effusion
• C. Progressive primary tuberculosis or lung abscess
• D. Pulmonary edema

Answer: (C)

Cavitation on chest imaging signals a necrotizing process in the lung that creates an air-filled space. The classic scenarios are conditions that destroy lung tissue, namely tuberculosis with caseating necrosis forming cavities and bacterial lung abscesses where pus erodes parenchyma to create a thick-walled cavity, often with an air–fluid level. Because of this tissue destruction pattern, cavitating lesions are most commonly associated with progressive primary tuberculosis or a lung abscess. In contrast, pneumonia usually presents with consolidation, pleural effusion with fluid in the pleural space, and pulmonary edema with interstitial and vascular congestion—none of which characteristically form cavities.