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Song, Kim, Lee, Choi, Lee, Kim, and Park: Enhancing Solid Component within Mature Ovarian Teratomas on MR: Does it Indicate a Malignant Transformation?
Uroradiology
Original Article

Journal of the Korean Society of Radiology 2010; 62(3): 271-276.

Published online: 31 March 2010

DOI: https://doi.org/10.3348/jksr.2010.62.3.271

Enhancing Solid Component within Mature Ovarian Teratomas on MR: Does it Indicate a Malignant Transformation?

Myung Gyu Song, M.D., Kyeong Ah Kim, M.D., Chang Hee Lee, M.D., Jaewoong Choi, M.D., Jongmee Lee, M.D., Yun Hwan Kim, M.D., Cheol Min Park, M.D.

1Department of Radiology, College of Medicine, Korea University, Korea University Hospital, Korea.

Address reprint requests to: Kyeong Ah Kim, M.D., Department of Radiology, Korea University Guro Hospital 97 Guro-dong, Guro-gu, Seoul 152-703, Korea. Tel. 82-2-818-6198, Fax. 82-2-863-9282, kahkim@korea.ac.kr

Received 15 August 2009       Accepted 12 October 2009

Copyright © 2010 The Korean Society of Radiology

Abstract

Purpose

To evaluate the enhancing solid component within mature ovarian teratomas on pelvic MR examinations.

Materials and Methods

Thirty-two women with surgically proven mature cystic teratomas underwent preoperative pelvic MR examinations. Five cases had an enhancing solid component within mature cystic ovarian teratomas on MR images. The MR images were retrospectively analyzed by two radiologists by consensus, focusing on the enhancing portion of tumor and the tumor itself.

Results

The study subjects include 5 patients (15.6%) with enhancing solid components within the mature ovarian cystic teratomas. The mean tumor size was 9.8 cm and they were all unilateral. The enhancing solid components of the tumors had a variable appearance and were located in the peripheral region. No cases were found to have a transmural extension or direct invasion of the neighboring pelvic organ.

Conclusion

An enhancing solid component associated with mature ovarian teratomas is not uncommon. This finding does not however, necessarily indicate malignant transformation.

Keywords: Magnetic Resonance Imaging, Teratoma, Cell transformation, Ovarian Neoplasms

Figures and Tables

Fig. 1

Benign mature cystic teratoma of right ovary in a 40-year-old woman (patient 3 on table 2). Axial T1-weighted (A) and fat-suppression (B) MR images show large lobulated mass containing fat component (arrows). At more caudal level, axial T1-weighted fat-suppression (C) and contrast-enhanced fat-suppression (D) MR images show ovoid enhancing portion (arrows) within the mass.

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Fig. 2

Benign mature cystic teratoma of left ovary in a 6-year-old girl (patient 5 on table 2). Axial T1-weighted (A) and fat-suppression (B) MR images show large multiloculated mass containing fat component (arrows). At more cranial level, axial T1-weighted (C) and contrast-enhanced (D) MR images show horseshoe-shaped enhancing portion (arrows) within the mass.

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Fig. 3

Benign mature cystic teratoma of left ovary in a 25-year-old woman (patient 4 on table 2). Axial T1-weighted (A) and fat-suppression (B) MR images show large multiloculated ovoid mass containing fat component (arrows). At more caudal level, axial T1-weighted fat-suppression (C) and contrast-enhanced (D) MR images show Y-shaped enhancing portion (arrows) within the mass.

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Table 1

Patient Characteristics of Ovarian Mature Teratomas with Enhancing Solid Portion

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Table 2

MR Imaging Findings of Ovarian Mature Teratomas with Enhancing Solid Portion

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