Tuberculosis and Lung Cancer: Insights from a Narrative Review.

The interaction between LC and active TB has been known for many years. The first description of 'cancerous phthisis' was reported by Bayle in 1810. The results of subsequent attempts to establish an etiological correlation between the two clinical entities have ranged from insignificant-even antagonistic-to a direct causal relationship. This narrative review explores the relationship between tuberculosis and LC assessing overall and site-specific malignancy risks in individuals with TB compared with the general population. We also examine the timing of cancer development following TB, highlighting periods of elevated risk. Chronic inflammation, immune dysregulation, and metabolic changes associated with TB may contribute to tumor initiation and progression, with organ-specific factors influencing susceptibility to cancers such as lung, head and neck, gastrointestinal, and hematologic malignancies. Clinically, awareness of these interactions supports targeted TB screening in high-risk cancer patients, careful monitoring for TB reactivation during cancer therapy, and consideration of immunological and metabolic factors when planning treatment.