When Thyroid Meets Ovary: A Case Report of Struma Ovarii

Struma Ovarii is not a common tumor. It is a mature ovarian teratoma, completely or predominantly composed of thyroid tissue. It belongs to a specialised monodermal variety. Struma ovarii may have an association with hyperthyroidism; however, it is a rare association and just in about 8% of cases. Its diagnosis is mostly delayed because most of the patients do not present any symptoms. Some patients may develop symptoms of specific conditions like ovarian torsion, hyperthyroidism, and ascites. Ultrasound, MRI, CT scan, and scintigraphic evaluation are necessary to differentiate benign from malignant variety. The first line treatment option is surgical removal. There are lesser chances that the tumor will recur and the quality of life is improved significantly. In this case report, we have discussed a unique case of struma ovarii. It was duly diagnosed and appropriate management was done. The tumor was different from malignant ovarian tumor on the basis of ascites and tumor marker assessments. Thyroid function investigations were also normal. The tumor is incidentally found on imaging in most cases. The definitive diagnosis is established by a histopathological study. The first line of treatment is surgical removal and it usually leads to a successful prognosis. We will determine the challenges that are faced to reach the diagnosis and management of this rare tumor. Misdiagnosis is common. The treatment options are debatable because it is a rare tumor. In fertile and young age groups, fertility conserving surgeries like ovarian cystectomy or unilateral salpingo-oophorectomy are advised. For the purpose of treatment, in postmenopausal cases, total abdominal hysterectomy with bilateral salpingo-oophorectomy may sometimes be indicated. The quality of life will improve if investigations are done early and appropriate management is done.