Mature cystic teratomas form approximately 20% of all ovarian tumours. Of these, approximately 15% include benign thyroid tissue. When thyroid tissue comprises more than 50% of the ovarian teratoma, it is termed ‘‘struma ovarii’’. The exact incidence of malignancy in struma ovarii is hard to evaluate, because of its uncommon nature. The aim of this study is to report a rare case of follicular v...

INTRODUCTION Struma ovarii is a rare ovarian tumor, representing 0.5-1% of all ovarian tumors and 2-5% of ovarian teratomas. It is defined as an ovarian teratoma composed mostly of thyroid tissue. The symptoms are nonspecific, and the imaging studies can help in characterize the mass; however, the definitive diagnosis is usually given by the Pathologist. Classically, the treatment is the surgic...

BACKGROUND The present of malignant transformation in struma ovarii is exceedingly rare. Malignant struma ovarii is usually asymptomatic and infrequently diagnosed preoperatively. Because of its rarity, there is no consensus about diagnosis and management in the literature. CASE PRESENTATION A 40-year-old female presented for her obstetric examination with an incidental finding of a pelvic ma...

Struma ovarii [SO] is a rare, highly specialised form of mature ovarian teratoma, consisting predominantly of thyroid tissue. Malignant transformation occurs in about 5% of SO [1]. Diagnosis of malignant SO is usually made histologically. The majority of malignant SO show a follicular or papillary pattern of thyroid carcinoma. Conservative ovarian surgery is preferred when there is a concern ab...

We present a case of a 40-yr-old woman diagnosed with a primary malignant struma ovarii. The patient was admitted with the complaint of pelvic pain and a large pelvic mass in the mid-portion of lower abdomen on gynecological examination. Pre-operative tumor markers and routine biochemistry were unremarkable. She was treated with total abdominal hysterectomy and right salpingo-oopherectomy. Post...

BACKGROUND Struma ovarii is a rare ovarian teratoma with non-specific clinical presentation that can mimic malignancy, especially when combined with the presence of ascites. Since the surgical procedures performed for benign and malignant tumors are quite different, pre-operative differential diagnosis is key. In this case report we compare the levels of biomarkers CA 125 and HE4 in the differe...

OBJECTIVE The aim of this study was to investigate the preoperative characteristics of benign mature cystic teratoma (MCT) and struma ovarii and their risk factors associated malignancies, and determine the appropriate treatment options for these tumors. METHODS This was a retrospective study on 248 patients who were pathologically diagnosed with ovarian MCT, struma ovarii, or malignant trans...

Struma ovarii is a specialized ovarian teratoma composed predominantly of mature thyroid tissue. It is associated with pleural effusion and ascites (Pseudo-Meigs’ syndrome) in 5% of cases. Majorities of the strumas are benign, however occasionally malignant transformation may be seen. We report a case of a 45 years old postmenopausal woman who presented with gradually increasing dyspnoea and di...