CTICasesMature Mediastinal Teratoma
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Imaging findings
Chest CT shows a well-defined anterior mediastinal mass containing areas of fluid and macroscopic fat without distinct calcification, associated with a left-sided pleural effusion.
Key takeaways
Mature teratomas are benign germ cell tumors that most commonly locate in the anterior mediastinum. While they characteristically contain fat, fluid, tissue, and calcification (such as bone or teeth), the presence of fluid and macroscopic fat is highly suggestive of the diagnosis, and associated pleural effusions can occur due to mass effect or inflammatory reaction.
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