J Korean Soc Radiol.  2010 May;62(5):457-460. 10.3348/jksr.2010.62.5.457.

A Posterior Mediastinal Seminoma with Extensive Cystic Change

• Lee YH
• Jeon KN
• Park MJ
• Kim JE
• Bae K
• Choi DS
• Na JB
• Lee JH
• Jang IS

• KMID: 2002953
• DOI: http://doi.org/10.3348/jksr.2010.62.5.457

Abstract

The posterior mediastinum is a rare site of origin for seminoma, and extensive cystic change of a seminoma is rarely observed. We present here the case of a 62-year-old male patient with a primary posterior mediastinal seminoma that was encasing the descending thoracic aorta and the tumor showed prominent cystic change on CT and MRI, and intense FDG uptake on PET/CT.

MeSH Terms

Aorta, Thoracic
Fluorodeoxyglucose F18
Humans
Magnetic Resonance Imaging
Male
Mediastinal Neoplasms
Mediastinum
Middle Aged
Seminoma
Tomography, X-Ray Computed
Fluorodeoxyglucose F18

Figure

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  Fig. 1 A posterior mediastinal seminoma with prominent cystic change in a 62-year-old man. A. The contrast-enhanced chest CT scan shows a large cystic posterior mediastinal mass enveloping the descending thoracic aorta. Soft tissue components are present in the periaortic area (arrows). The attenuation coefficients of the cystic area ranged from 1 to 19 HUs on the unenhanced and enhanced scans. B. The axial T2-weighted MR imaging of the chest shows the extensive cystic and periaortic soft tissue components of the mass. C. 18F-FDG PET/CT at the level of the carina shows intense uptake by a peribronchial lymph node (arrow) and in the periaortic area. D. 18F-FDG PET/CT at the level of the left atrium shows hypermetabolic components in the periaortic area (arrows), the periphery of the mass (arrowhead) and the thoracic spine.

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