Mature Teratoma


On CT, teratomas are sharply defined; low-attenuation cystic components predominate. Fatty tissue is seen in about 50% of cases, and fat-fluid levels have been reported. Foci of calcification and ossification are commonly seen; in addition, soft tissue attenuation may be depicted. In rare cases, the tumor may erode and rupture into adjacent structures, such as the lung, tracheobronchial tree, and pleural space. (See the image below.)
Thymic cystic teratoma. This thin-walled cystic maThymic cystic teratoma. This thin-walled cystic mass contains a fat-fluid level. 
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