We describe a patient with squamous cell carcinoma arising in a mature tera
toma. Magnetic resonance (MR) images revealed a solid lobulated mass attach
ed to the ovarian cyst containing a fat-fluid level. The solid component wi
th extension into pelvic fat showed as hypointensity on T2-weighted MR imag
es with good enhancement. A metastatic tumor to the urinary bladder was als
o demonstrated. (C) 1999 Elsevier Science Ltd. All rights reserved.