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Case Report
Struma ovarii coexisting with recurrent uterine fibroids in a postmenopausal patient
1 Department of Obstetrics/Gynaecology, University of Uyo, Uyo, Nigeria
2 Department of Obstetrics/Gynaecology, University of Uyo Teaching Hospital, Uyo, Nigeria
3 Department of Anaesthesia, University of Uyo Teaching Hospital, Uyo, Nigeria
4 Department of Surgery, University of Uyo Teaching Hospital, Uyo, Nigeria
5 Department of Histopathology, University of Uyo, Uyo, Nigeria
Address correspondence to:
Aniekan Monday Abasiattai
Professor, Department of Obstetrics/Gynaecology, University of Uyo, Uyo,
Nigeria
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Article ID: 100223Z08AA2026
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Abasiattai AM, Olisaeeke FI, Antai MMS, Ugochukwu RO, Abudu EK. Struma ovarii coexisting with recurrent uterine fibroids in a postmenopausal patient. J Case Rep Images Obstet Gynecol 2026;12(1):9–13.ABSTRACT
Introduction: Ovarian teratomas are ovarian tumors that originate from primordial germ cells. Struma ovarii (SO) is a very rare specialized monodermal variant of the mature cystic teratoma, which consists exclusively or predominantly of mature thyroid tissue and occurs most commonly in premenopausal women.
Case Report: We hereby report the rare case of a 70-year-old postmenopausal woman who presented with vaginal bleeding and abdominal distention 20 years after the menopause. She was found to have a huge uterine mass, hemorrhagic ascites, and a left adnexal cystic mass with solid areas mimicking a malignancy. Histological analysis of the surgical specimens confirmed a SO coexisting with recurrent uterine fibroids. She had a total abdominal hysterectomy and bilateral salpingo-oophorectomy with a good outcome.
Conclusion: Benign SO, a very rare variety of specialized monodermal teratomas, can coexist with ascites and large recurrent uterine fibroids several years after menopause, mimicking malignancy. Timely diagnosis and excision of both tumors via an abdominal hysterectomy and bilateral salpingo-oophorectomy resulted in a good outcome in our patient.
Keywords: Monodermal teratoma, Postmenopausal fibroids, Struma ovarii, Teratoma variant
SUPPORTING INFORMATION
Author Contributions
Aniekan Monday Abasiattai - Substantial contributions to conception and design, Acquisition of data, Interpretation of data, Drafting the article, Revising it critically for important intellectual content, Final approval of the version to be published
Felix Ikenna Olisaeeke - Acquisition of data, Revising it critically for important intellectual content, Final approval of the version to be published
Mary Magdalene Sylvester Antai - Acquisition of data, Revising it critically for important intellectual content, Final approval of the version to be published
Richard Odionyeme Ugochukwu - Acquisition of data, Revising it critically for important intellectual content, Final approval of the version to be published
Emmanuel Kunle Abudu - Acquisition of data, Interpretation of data, Revising it critically for important intellectual content, Final approval of the version to be published
Guaranter of SubmissionThe corresponding author is the guarantor of submission.
Source of SupportNone
Consent StatementWritten informed consent was obtained from the patient for publication of this article.
Data AvailabilityAll relevant data are within the paper and its Supporting Information files.
Conflict of InterestAuthors declare no conflict of interest.
Copyright© 2026 Aniekan Monday Abasiattai et al. This article is distributed under the terms of Creative Commons Attribution License which permits unrestricted use, distribution and reproduction in any medium provided the original author(s) and original publisher are properly credited. Please see the copyright policy on the journal website for more information.
