Struma ovarii: appearance on MR images |
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Authors: | I Joja T Asakawa A Mitsumori T Nakagawa Y Hiraki T Kudo M Ando N Akamatsu |
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Institution: | (1) Department of Radiology, Okayama University Medical School, 2-5-1 Shikata-cho, Okayama-City, Okayama 700, Japan, JP;(2) Department of Obstetrics and Gynecology, Okayama University Medical School, 2-5-1 Shikata-cho, Okayama-City, Okayama 700, Japan, JP;(3) Department of Obstetrics and Gynecology, Kurashiki Seijinbyo Center, 250 Bakuro-cho, Kurashiki-City, Okayama 710, Japan, JP;(4) Department of Obstetrics and Gynecology, Himeji Red Cross Hospital, 5-30-1 Tatsuno-cho, Himeji-city, Hyogo 670, Japan, JP |
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Abstract: | Background: The purpose of this multi-institutional study was to examine the appearance of struma ovarii on magnetic resonance (MR) images.
Methods: MR images of 12 patients with histologically proven struma ovarii were retrospectively reviewed. All patients underwent T1-weighted
and T2-weighted imaging. Contrast-enhanced T1-weighted images with Gd-DTPA were available in 10 patients. The following determinations
were made: tumor morphology, signal intensities, contrast-enhancement effects of solid components with Gd-DTPA, and comparison
of MR images with resected specimens.
Results: All 12 patients had both cystic and solid components, with a multilobulated surface and thickened septa. Signal intensities
on T1-weighted images were mainly low, partly intermediate to high, or high, and those on T2-weighted images were mainly high,
with different signal intensities. Contrast-enhancement effects were marked or moderate. The contents that showed low signal
intensities on T1-weighted images and signal voids or low signal intensities on T2-weighted images were viscid gelatinous
materials.
Conclusions: A multicystic tumor with a solid component, a multilobulated surface, and signal intensities that indicate the presence of
viscid gelatinous materials appear to be a characteristic MR finding of struma ovarii.
Received: 10 April 1997/Accepted after revision: 7 July 1997 |
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Keywords: | : Struma ovarii— Ovaries— MR imaging— Neoplasms— Thyroid |
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