CTICasesMature Cystic Teratoma (Middle Mediastinum)
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Imaging findings
Chest CT demonstrates a well-circumscribed right paratracheal mass in the middle mediastinum that mimics a bronchogenic cyst but contains internal fat attenuation and fluid-like sebaceous elements.
Key takeaways
Although mature cystic teratomas overwhelmingly arise in the anterior mediastinum, they can rarely present in the middle or posterior mediastinum. When located in these atypical compartments, they can closely mimic other cystic lesions such as bronchogenic or duplication cysts, but the detection of internal fat or calcification on CT is highly specific for teratoma.
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