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  • Title: Struma ovarii: MR findings.
    Author: Dohke M, Watanabe Y, Takahashi A, Katayama T, Amoh Y, Ishimori T, Okumura A, Oda K, Mitsudo K, Minami K, Ukita M, Dodo Y.
    Journal: J Comput Assist Tomogr; 1997; 21(2):265-7. PubMed ID: 9071297.
    Abstract:
    PURPOSE: The purpose of this study was to determine the MR appearance of struma ovarii correlating with the pathological features. METHOD: MR findings of two patients with struma ovarii were retrospectively reviewed and compared with the pathological findings. RESULTS: Both tumors were complex masses composed of multiple cysts and solid components. The size and signal intensity of multiple cysts varied within the tumor. Hyperintense cystic areas on T1-weighted images were thought to correspond pathologically to hemorrhagic cysts and follicles containing viscous proteinaceous colloid. Solid components had as high a signal intensity as did uterine endometrium on T2-weighted images and as intermediate a signal intensity as did uterine muscle layer on T1-weighted images. After intravenous administration of gadolinium-DTPA, the solid components showed marked contrast enhancement. There was also ascitic fluid associated with adhesion and peritoneal thickening. CONCLUSION: The characteristic MR appearance of struma ovarii is thought to be a mixed mass composed of T2-hyperintense solid components with intense contrast enhancement and multiple T1-hyperintense cystic areas suggestive of hemorrhagic degeneration and viscous proteinaceous colloid.
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