CTICasesMediastinal Cavernous Hemangioma
Imaging findings
Chest radiograph demonstrates an abnormal mediastinal contour. CT shows a large anterior mediastinal soft tissue mass displacing the aorta and great vessels with multiple internal areas of heterogeneous blushing enhancement. MRI demonstrates a markedly T2-hyperintense mass with slow-flow vascular enhancement pattern. PET shows minimal FDG avidity.
Key takeaways
Mediastinal hemangiomas are rare benign vascular tumors that typically present as well-circumscribed anterior or middle mediastinal masses. The characteristic MRI features (marked T2 hyperintensity, phleboliths) are pathognomonic when present. The absence of significant FDG avidity on PET distinguishes them from malignant anterior mediastinal masses.
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