IFNG and tuberculosis: Tuberculin skin test, interferon-gamma release assay, sputum examination, bronchoalveolar lavage, chest radiograph, adenosine deaminase levels, cerebrospinal fluid examination, fine-needle aspiration cytology of lymph nodes, ascetic fluid examination, pleural fluid examination, and high-resolution computed tomography are some of the investigations, which may aid in the diagnosis of miliary TB.