Mediastinal teratoma diagnosed via ultrasound-guided biopsy.

A 21 year old female presented with incidental findings of complex anterior mediastinal mass. This patient was otherwise healthy, without contributory medical, surgical, family or social history. CT imaging identified a right paracardiac mediastinal mass with components of variable attenuation, including fluid, soft tissue and fat components. Mediastinal mature teratoma was suspected. Cystic or necrotic neoplasms, as well as immature teratoma, required exclusion [1].