Abstract: Objective  The CT manifestations and features of endobrochial tuberculosis (EBTB) complicated by mucous plug impact (MPI) were analyzed in order to improve the levels of imaging diagnosis.   Methods  CT features and morphological characteristics of 25 cases of EBTB complicated by MPI who were confirmed the diagnosis by fiberoptic bronchoscopy was analyzed.   Results  There were typical CT features in EBTB complicated by MPI: (1)Direct signs: 10 cases (40.0%) of crotch-like shadow, 8 cases (32.0%) of squeezing toothpaste-like shadow, 7 cases (28.0%) of glove-like shadow. (2) Distribution and morphology of lesions:  irregular lumpy shadows distributed in interior 2/3 lung fields in each lobe, lesions are expansive, with sharp edges, and concentrically distributed. (3)Characteristic of accompanied signs: around the main lesions, 23 (92.0%) cases surrounded by multiple punctate and small pieces of satellite lesions, 13 (52.0%) patients had chronic formation process, like concentrated lung-markings in focals, reduced lung volume, and emphysema. 6 cases (24.0%) with CT examination showed the left or right main bronchus stenosis. (4)Characteristic of enhanced CT: CT valuation of mass focals of 12 patients was less than 20HU for enhanced CT. After the regular anti-TB treatment, all 25 patients had good therapeutic effect.   Conclusion  EBTB complicated by MPI could display crotch, squeezingtoothpaste or glovelike signs. Mastering the CT manifestations and features is conducive to improve the imaging diagnosis levels of EBTB complicated by MPI.

Key words: Tuberculosis, bronchi/radiography, Tuberculosis, bronchi/complications, Tomography, X-ray computed