Cystic struma ovarii: imaging findings
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Updated: Oct 15, 2026

A Coregistered Ultrasound and Photoacoustic Imaging Protocol for the Transvaginal Imaging of Ovarian Lesions
Published on: March 3, 2023
1Department of Radiology, Nippon Medical School, Chiba-Hokuso Hospital, Chiba, Japan. okada@nms.ac.jp
Abstract:
We report three cases of cystic struma ovarii not associated with any solid component. One case was a thin-walled unilocular mass, and the other two cases were multilocular cystic masses. An area of signal void on T2-weighted images and intermediate intensity on T1-weighted images was noted in the two multilocular cases. Preoperative diagnosis was difficult in each case, but struma ovarii should be included in differential diagnoses even in the case of a completely cystic ovarian mass.
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