Abstract: Objective The aim of this study is to retrospectively analyze the chest CT manifestations of pulmonary tuberculosis in patients with low CD4⁺T count of HIV infection, and to investigate the imaging features of pulmonary tuberculosis with low CD4⁺T count in HIV infected patients. Methods Chest CT of 32 patients who has been diagnosed with HIV infection and pulmonary tuberculosis and with CD4⁺T cell count less than 200/μl were analyzed. Results 32 cases of low CD4⁺T cell count of HIV infection of chest imaging features were mainly as follows: cavity shadow in 17 cases, consolidation shadow in 29 cases, diffuse miliary shadow in 14 cases, pleural effusion in 21 cases; 3 cases of calcification, 9 cases of fibrous lesions and 30 cases of mediastinal or hilum lymph node tuberculosis. Conclusions Low CD4⁺T cell count of HIV infection in patients with pulmonary tuberculosis showed a variety of imaging features, disseminated pulmonary tuberculosis and lymph node tuberculosis were easily found while calcification and fibrous lesions are rare, presenting imaging feature of atypical pulmonary tuberculosis.

Key words: Pulmonary tuberculosis, HIV, CT