Fluid Collection in the Right Lateral Portion of the Superior Aortic Recess Mimicking a Right Mediastinal Mass: Assessment with Chest Posterior Anterior and MDCT.
10.3348/kjr.2012.13.5.579
- Author:
Dong Rock SHIN
1
;
Dae Shick RYU
;
Man Soo PARK
;
Seung Mun JUNG
;
Jae Hong AHN
;
Jong Hyeog LEE
;
Soo Jung CHOI
Author Information
1. Department of Radiology, Gangneung Asan Hospital, College of Medicine, University of Ulsan, Gangneung 210-711, Korea. ryu@gnah.co.kr
- Publication Type:Original Article
- Keywords:
Mediastinum;
CT-pericardium;
Fluid-pericardium;
CT
- MeSH:
Aged;
Aged, 80 and over;
Aorta, Thoracic/*radiography;
Cardiomegaly/radiography;
Contrast Media/diagnostic use;
Diagnosis, Differential;
Female;
Humans;
Mediastinal Diseases/*radiography;
Middle Aged;
Pleural Effusion/*radiography;
Pulmonary Edema/*radiography;
Radiography, Thoracic/*methods;
Retrospective Studies;
Tomography, X-Ray Computed/*methods
- From:Korean Journal of Radiology
2012;13(5):579-585
- CountryRepublic of Korea
- Language:English
-
Abstract:
OBJECTIVE: We observed patients in whom the fluid collection in the right lateral portion of the superior aortic recess on computed tomography (CT) scans mimicked a right anterior mediastinal mass on chest PA radiographs. The purpose of this study was to assess chest PA and CT features of these patients. MATERIALS AND METHODS: All chest PA radiographs and CT scans in 9 patients were reviewed by two radiologists on a consensus basis; for the presence of pleural effusion, pulmonary edema and heart size on chest PA radiographs. For the portion of the fluid collection in the superior aortic recess (SAR), a connection between the right lateral portion of the SAR (rSAR) and posterior portion of the SAR (pSAR) on CT scans, and the distance between the right lateral margin of the rSAR and the right lateral margin of the superior vena cava. RESULTS: Fluid collection in the rSAR on CT scans caused a right anterior mediastinal mass or a bulging contour on chest PA radiographs in all women patients. All patients showed cardiomegaly, five patients had pleural effusion, and two patients had mild pulmonary edema. Further, eight patients showed a connection between the rSAR and the pSAR. CONCLUSION: The characteristic features of these patients are the right anterior mediastinal mass-like opacity due to fluid collection in the rSAR, are bulging contour with a smooth margin and cardiomegaly regardless of pulmonary edema on the chest PA radiographs, and fluid connection between the rSAR and the pSAR on CT scans.
