CTICasesMediastinal and Retroperitoneal Venous Malformation
Imaging findings
Chest and abdominal CT/MRI demonstrate a giant, complex venous malformation extending from the mediastinum, through the diaphragm, and into the retroperitoneum. The mass contains fat and multiple calcified phleboliths. SVC venogram shows pooling of contrast, representing a contained rupture of the malformation during childbirth.
Key takeaways
Venous malformations are slow-flow vascular lesions characterized by phleboliths and fat. They can grow during pregnancy due to hormonal changes and high venous pressures, occasionally undergoing contained rupture during delivery.
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