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Fibrosing mediastinitis: CT and MR findings
E Rodríguez1, R Soler, F Pombo
1Department of Radiology, Hospital Juan Canalejo, La Coruña, Spain.
Clinical Radiology
|December 29, 1998
Summary
Computed tomography (CT) and magnetic resonance (MR) imaging reveal key findings in fibrosing mediastinitis, often linked to tuberculosis. Imaging characteristics like calcifications and signal intensities aid in diagnosing this rare condition.
Area of Science:
- Radiology
- Medical Imaging
- Thoracic Imaging
Background:
- Fibrosing mediastinitis is a rare condition characterized by the proliferation of fibrous tissue in the mediastinum.
- Tuberculosis is a potential underlying cause of fibrosing mediastinitis.
- Accurate diagnosis relies on characteristic findings on medical imaging.
Observation:
- This study presents computed tomography (CT) and magnetic resonance (MR) findings in three cases of fibrosing mediastinitis.
- Two cases involved diffuse mediastinal infiltration, while one presented as a posterior mediastinal mass.
- CT demonstrated infiltrating soft-tissue masses with calcifications in diffuse cases, with variable contrast enhancement.
Findings:
- MR imaging of diffuse masses showed heterogeneous signals on T1-weighted and T2-weighted images, with heterogeneous enhancement post-contrast.
- The posterior mediastinal mass exhibited homogeneous enhancement on CT and specific signal intensities on MR.
- CT findings of infiltrative or well-defined masses with calcifications are suggestive of fibrosing mediastinitis.
Implications:
- CT findings, particularly calcifications, are crucial for suggesting fibrosing mediastinitis.
- MR imaging offers additional diagnostic value, especially for non-calcified lesions, by identifying fibrous tissue characteristics.
- Radiologists should consider fibrosing mediastinitis in the differential diagnosis of mediastinal masses with these imaging features.