Tuberculosis is a common clinical disease. In addition to pulmonary tuberculosis, other parts of the body such as cervical lymph, abdominal lymph, pleura, and bones can also be infected with tuberculosis. Tuberculosis is categorized into primary tuberculosis and secondary tuberculosis. Secondary tuberculosis of the right upper lung refers to secondary tuberculosis that occurs in the right upper lung. Tuberculosis is mainly characterized by symptoms such as cough and fever. Some patients have no obvious symptoms in the early stage, and most of them are found by chance during physical examination. Currently, occult tuberculosis can be detected clinically by examining Mycobacterium tuberculosis-specific T-lymphocytes or chest CT.