ABSTRACT
Objective: To investigate the atypical CR,DR,and CT appearances of pulmonary tuberculosis and to analyse the causes of misdiagnosis.Methods: CR or DR of Chest PA & LAT and CT of Chest Routine Scan were performed in 30 cases of pulmonary tuberculosis,CT Enhanced Scan performed in 8.All of the cases were confirmed by clinical results or pathology.Results: The CR,DR,and CT findings were classified into 4 types:1) nodule or mass type(n=15):the edge was smooth(n=7)and ill-defined(n=4)and lobular(n=5);2)patchy consolidation type(n=8):this appeared irregular with homogeneous density and ill-defined edge;3)atelectasis type(n=5):this showed stenosis or occlusion of the lobar or segmental bronchus with the collapsed lung;4)solid changing type with gas & liquid sign of Mid & lower-lung(n=2):this expressed 2~3 gas & liquids sign inside.Conclusion: The episode of pulmonary tuberculosis presents a new tendency of the increasing incidence in the elderly.CR,DR,and CT findings are variable.Thus,a comprehensive analysis of all imaging features is necessary to avoid misdiagosis.