Pulmonary tuberculosis: up-to-date imaging and management

Area of Science:

• Radiology
• Infectious Diseases
• Pulmonology

Background:

• Pulmonary tuberculosis (TB) remains a significant global health issue, particularly in developing nations.
• Traditional concepts of TB progression (primary vs. reactivation) are being re-evaluated.
• Radiologic manifestations of TB are now understood to be primarily influenced by the host's immune status.

Purpose of the Study:

• To present the updated understanding of pulmonary TB diagnosis and treatment.
• To review characteristic imaging findings across various forms of pulmonary TB.
• To evaluate the utility of computed tomography (CT) in diagnosing and managing pulmonary TB.

Main Methods:

• Review of current literature on pulmonary tuberculosis imaging.
• Analysis of characteristic radiologic findings associated with different TB presentations.
• Assessment of the role of CT in TB detection, activity assessment, complication identification, and treatment planning.

Main Results:

• Host immunity level is a key determinant of radiologic features in pulmonary TB.
• CT is valuable for detecting TB when chest radiographs are normal or equivocal.
• CT aids in assessing disease activity, identifying complications, and guiding surgical management.

Conclusions:

• Advanced diagnostic tests like DNA fingerprinting and interferon-gamma assays offer faster, more accurate TB detection.
• Impaired immunity is associated with miliary, disseminated primary, or atypical TB patterns.
• CT is essential for comprehensive TB management, including surgical planning; PET scans may help differentiate TB granulomas from lung cancer.