Objective To analyze the imaging manifestations of bronchogenic cyst(BC)and summarize the causes of misdiagno-sis,in order to improve the diagnostic and differential diagnostic level for BC.Methods A retrospective analysis was performed on the imaging data of 84 patients surgically and pathologically confirmed BC.All patients underwent plain CT scans,with 66 cases further received contrast-enhanced CT scans and other 12 cases underwent plain MRI scans,6 of which underwent contrast-enhanced MRI scans.Results A1184 cases presented as solitary lesions,comprising mediastinal(n=71),intrapulmonary(n=4)and ectopic(n=9)types.The lesions were predominantly round(69 cases),flattened(5 cases),or irregular(10 cases)in shape.Gas was observed in 4 cases,with one showed air-fluid level.66 cases exhibited soft tissue density,14 cases showed water-like density,and other 4 cases displayed high density.Calcifications,either punctate or arcuate in shape,were found on the lesion margins in 2 cases.Among the 66 cases that underwent contrast-enhanced CT scans,11 showed mild enhancement,with 5 cases only mild annular enhancement of the cyst wall.MRI findings in 12 cases revealed iso-T1 signals and long or slightly long T2 signals,with no enhancement detected on contrast-enhanced scans.The misdiagnosis rate for mediastinal BC was 76.1％(54/71),while all intrapulmonary and ectopic BC were misdi-agnosed preoperatively.Conclusion BC shares similar imaging manifestations with various other diseases,resulting in a high misdi-agnosis rate.Integrating clinical symptoms with multimodal imaging features and enhancing diagnostic awareness and experience are essential for improving the diagnostic accuracy of BC.

Objective To analyze the imaging manifestations of bronchogenic cyst(BC)and summarize the causes of misdiagno-sis,in order to improve the diagnostic and differential diagnostic level for BC.Methods A retrospective analysis was performed on the imaging data of 84 patients surgically and pathologically confirmed BC.All patients underwent plain CT scans,with 66 cases further received contrast-enhanced CT scans and other 12 cases underwent plain MRI scans,6 of which underwent contrast-enhanced MRI scans.Results A1184 cases presented as solitary lesions,comprising mediastinal(n=71),intrapulmonary(n=4)and ectopic(n=9)types.The lesions were predominantly round(69 cases),flattened(5 cases),or irregular(10 cases)in shape.Gas was observed in 4 cases,with one showed air-fluid level.66 cases exhibited soft tissue density,14 cases showed water-like density,and other 4 cases displayed high density.Calcifications,either punctate or arcuate in shape,were found on the lesion margins in 2 cases.Among the 66 cases that underwent contrast-enhanced CT scans,11 showed mild enhancement,with 5 cases only mild annular enhancement of the cyst wall.MRI findings in 12 cases revealed iso-T1 signals and long or slightly long T2 signals,with no enhancement detected on contrast-enhanced scans.The misdiagnosis rate for mediastinal BC was 76.1％(54/71),while all intrapulmonary and ectopic BC were misdi-agnosed preoperatively.Conclusion BC shares similar imaging manifestations with various other diseases,resulting in a high misdi-agnosis rate.Integrating clinical symptoms with multimodal imaging features and enhancing diagnostic awareness and experience are essential for improving the diagnostic accuracy of BC.