Which radiographic finding is associated with active pulmonary TB?

Which radiographic finding is associated with active pulmonary TB?

• A. Cavitations on CXR
• B. Pleural effusion with no cavitation
• C. Bronchiectasis
• D. Lobar atelectasis

Answer: (A)

Active pulmonary TB classically presents with cavitary lesions in the upper lobes on chest radiograph. TB bacilli survive best in the oxygen-rich apical regions, and the body's immune response creates caseating granulomas that liquefy to form cavities. These cavitations indicate active, contagious disease and typically reflect a higher bacterial load, guiding urgent isolation and treatment. Other findings like a pleural effusion without cavitation, bronchiectasis, or lobar atelectasis can occur with various lung conditions and are not as specific for active pulmonary TB as cavitation in the upper lobes.

Active pulmonary TB classically presents with cavitary lesions in the upper lobes on chest radiograph. TB bacilli survive best in the oxygen-rich apical regions, and the body's immune response creates caseating granulomas that liquefy to form cavities. These cavitations indicate active, contagious disease and typically reflect a higher bacterial load, guiding urgent isolation and treatment.

Other findings like a pleural effusion without cavitation, bronchiectasis, or lobar atelectasis can occur with various lung conditions and are not as specific for active pulmonary TB as cavitation in the upper lobes.