OBJECTIVE: We evaluated the intracystic MR signal intensity of mediastinal cystic masses to identify characteristic intensity patterns according to histologic type. MATERIALS AND METHODS: Magnetic resonance imaging was performed on 26 cystic mediastinal masses consisting of 8 thymic cysts, 5 bronchogenic cysts, 4 pericardial cysts, 5 cystic teratomas, and 4 cystic neurogenic tumors. Signal intensity ratios of each cyst to muscle were calculated on T1-weighted imaging. Surgical records were reviewed to document the presence of intracystic hemorrhage. Chemical analysis of intracystic fluid was performed in three cases. RESULTS: Bronchogenic cysts, cystic teratomas, and cystic neurogenic tumors had relatively high levels of signal intensities. Each pericardial cyst had a lower signal intensity than muscle. The signal intensities of thymic cysts were variable. Intracystic hemorrhage was present in 1 bronchogenic cyst, 2 cystic neurogenic tumors, 4 cystic teratomas, and 3 thymic cysts. No hemorrhage was found in any of the pericardial cysts. Sebaceous fluid was present in 1 cystic teratoma. CONCLUSION: The varying intensities of different cysts were considered to reflect the nature of the intracystic fluid. Since the nature of the fluid can reflect the histology to some extent, T1-weighted MRI will help to differentiate cystic mediastinal masses.
OBJECTIVE: We evaluated the intracystic MR signal intensity of mediastinal cystic masses to identify characteristic intensity patterns according to histologic type. MATERIALS AND METHODS: Magnetic resonance imaging was performed on 26 cystic mediastinal masses consisting of 8 thymic cysts, 5 bronchogenic cysts, 4 pericardial cysts, 5 cystic teratomas, and 4 cystic neurogenic tumors. Signal intensity ratios of each cyst to muscle were calculated on T1-weighted imaging. Surgical records were reviewed to document the presence of intracystic hemorrhage. Chemical analysis of intracystic fluid was performed in three cases. RESULTS: Bronchogenic cysts, cystic teratomas, and cystic neurogenic tumors had relatively high levels of signal intensities. Each pericardial cyst had a lower signal intensity than muscle. The signal intensities of thymic cysts were variable. Intracystic hemorrhage was present in 1 bronchogenic cyst, 2 cystic neurogenic tumors, 4 cystic teratomas, and 3 thymic cysts. No hemorrhage was found in any of the pericardial cysts. Sebaceous fluid was present in 1 cystic teratoma. CONCLUSION: The varying intensities of different cysts were considered to reflect the nature of the intracystic fluid. Since the nature of the fluid can reflect the histology to some extent, T1-weighted MRI will help to differentiate cystic mediastinal masses.
Authors: Xing Wang; Xiaofang You; Li Zhang; Dayu Huang; Beatrice Aramini; Leonid Shabaturov; Gening Jiang; Jiang Fan Journal: Ann Transl Med Date: 2021-12
Authors: Vincenzo Napolitano; Angelo M Pezzullo; Pio Zeppa; Pietro Schettino; Maria D'Armiento; Antonietta Palazzo; Cristina Della Pietra; Salvatore Napolitano; Giovanni Conzo Journal: World J Surg Oncol Date: 2013-02-02 Impact factor: 2.754
Authors: Jin Wang Park; Won Gi Jeong; Jong Eun Lee; Hyo Jae Lee; So Yeon Ki; Byung Chan Lee; Hyoung Ook Kim; Seul Kee Kim; Suk Hee Heo; Hyo Soon Lim; Sang Soo Shin; Woong Yoon; Yong Yeon Jeong; Yun Hyeon Kim Journal: Korean J Radiol Date: 2020-08-11 Impact factor: 3.500