DEFINITION
– Struma ovarii is monodermal teratoma in which thyroid tissue is exclusively present or constitutes > 50% of mature cystic teratoma
IMAGING
– Multilocular cystic mass with avidly enhancing soft tissue component ± dermoid cyst
– Cystic portion shows various signal on MRI
; T2 low signal intensity foci = gelatinous material
– Multilocular cystic tumors containing “struma pearls” on USG
– Uptake in mass on I-123 imaging
Image from Diagnostic imaging, gynecology
C. Ghander et al.
Gynecologic Oncology, Volume 102, Issue 2, 2006, Pages 378-380