Thyroid carcinoma on struma ovarii (TCSO) is a rare ovarian tumor, derivate from monodermic teratomas. Virchows Arch Path Arat. Struma ovarii tumor is a subtype of an ovarian teratoma and is composed entirely or predominantly of thyroid tissue and containing variable-sized follicles with colloid material. Owing to malignant struma ovarii (MSO) rarity, there has been some controversy about RAS mutations both in the PTC … Struma ovarii is a monodermal germ cell tumor first de-scribed by R. Boëttlin in 1889 [1]. Boettlin R. Uber zahnentwickelung in dermoid cysten des ovariums. Gynecol. Invest. Discussion Le struma ovarii est un tératome mature monotissulaire rare. Patients may also experience expanding abdominal growth and a fluid wave consistent with ascites. Ascites may be present in up to a third of cases 7. They usually present a palpable abdominal mass and the tumors are unilateral and range from very small lesions up to as large as 10 cm in diameter. Scintigraphy showing increased radioiodine uptake in the pelvic mass compared to the thyroid is confirmatory. 8. There is a slightly hyperechoic focus within the lesion which demonstrates post acoustic shadowing. Struma ovarii is a rare cause of hyperthyroidism. 1889;115:493–504. Struma ovarii: CT findings. To qualify as a struma ovarii tumors more than 50% of the tumor should be composed of thyroid tissue 7. 2008;19 (2): 135-8. Struma ovarii is diagnosed when thyroid tissue accounts for >50% of the teratoma. Most cases of MSO are subclinical. ADVERTISEMENT: Radiopaedia is free thanks to our supporters and advertisers. May be seen as a multiloculated cystic mass, with solid parts. A 7.2-cm classical variant of PTC arising in a struma ovarii was identified in the right ovary. 4. While imaging features can be non-specific and overlap with other ovarian neoplasms, ultrasound and CT usually demonstrate a complex adnexal lesion with multiple cystic and solid areas, reflecting the gross pathologic appearance of the tumor 1. Struma ovarii is a rare type of mature teratoma, but its imaging features are rather distinct. A suspicion of the … Invest. Struma ovarii means ovarian goiter which originates from a single germ cell after the first meiotic division [1, 2] and is the most common type of mono- dermal teratoma in 3% of mature teratomas, 0.3-1% of ovarian tumour, 5-20% of mature teratoma has the component of thyroid tissue and only 2% of these cases were diagnos- ed SO. The complications may include: Stress and anxiety due to fear of cancer of the ovary; Large tumor masses may get secondarily infected with bacteria or fungus; Hyperthyroidism: Presence of an overactive thyroid gland causing symptoms such as … In this study, we … Concomitant struma ovarii and serous cystadenoma has been mentioned in only two case reports in the extensively searched medical literature. Radiographics. Most MSO are histologically classified as papillary thyroid carcinomas (PTC). intracranial teratoma with malignant transformation, mediastinal non-germinomatous germ cell tumors, mediastinal teratoma with malignant transformation. Struma ovarii: management and follow-up … (1-6) It is defined as an ovarian teratoma that is composed predominantly of thyroid tissue (> 50%), or forms a … ovarian teratomas with neural differentiation. 33 (6): 740-3. Histologic examination of tissues is a must to evaluate the extent of thyroid tissue in the teratoma, as well as for diagnostic purposes and differentiation from other types of ovarian tumors. Struma ovarii (SO) infrequently harbor carcinomas that are histologically similar to those arising in the eutopic thyroid. References 1. Abdom Imaging. Struma Ovarii. * Pleural effusion and … We discuss the approaches leading to the correct diagnosis and we review the management of the disease. Qian Y, Xiao Y, Zhen-Zhen L, Yu-Xin J, Jian-Chu LI, Na SU, Bo C, Bo Z Zhongguo Yi Xue Ke Xue Yuan Xue Bao 2015 Jun;37(3):309-14. doi: 10.3881/j.issn.1000-503X.2015.03.012. A struma ovarii is a rare form of monodermal teratoma that contains mostly thyroid tissue, which may cause hyperthyroidism. Struma ovarii is a rare ovarian tumour that has been reported to represent 0.5%–1.0% of all ovarian tumours. It is defined by the presence of thyroid tissue comprising more than 50% of the … Despite its name, struma ovarii is not restricted to the ovary. We report a rare occurrence of coexisting struma ovarii along with a serous cystadenoma in a 55 year old woman. Hatami M, Breining D, Owers RL et-al. [2, 3]. No fat is evident in these lesions. We report a case of a 52-year-old woman with the typical signs and symptoms of hyperthyroidism, in whom the diagnosis of struma ovarii was missed. -. It represents 2–3% of all ovarian tumours and by definition must be comprised of at least half thyroid tissue [2–4]. Clinique: * The most frequently symptom is abdominal pain (50 %) though a high percentage (40 %) of patients were asymptomatic (1). The presence of areas of very low signal intensity on T2-weighted images, due to the viscous colloid material is sometimes considered as suggestive for the presence of struma ovarii tumor. PMID: 26149143. 7. Ce terme est réservé aux tératomes comportant de façon exclusive ou prédominante du tissu thyroïdien. The rate of malignant transformation in struma ovarii is extremely low. Struma ovarii is ectopic thyroid tissue associated with dermoid tumors or ovarian teratomas that can secrete excessive amounts of thyroid hormone and produce thyrotoxicosis. Jung SE, Lee JM, Rha SE et-al. Thyroid tissue must comprise more than 50 percent of the overall tissue to be classified as a struma ovarii. Meigs JV. Struma ovarii is a teratoma in which thyroid tissue is present exclusively or forms a grossly recognizable component of a more complex teratoma [ 8 ]. First described by Von Klden in 1895 and Gottschalk in 1899, struma ovarii is the most common type of monodermal teratoma, and comprises about 3.0% of all ovarian teratomas. CT and MR imaging of ovarian tumors with emphasis on differential diagnosis. Obstet. Struma ovarii accounts for approximately 5 percent of all ovarian teratomas . Il peut subir les remaniements habituels du tissu thy- roïdien (adénome, thyroïdite, carci- nome) et se compliquer de thyréo- toxicose dans 5 % des cas environ. The vast majority of struma ovarii tumors (90-95% 1,5) tend to be benign and therefore carry a good prognosis. The gross pathologic appearance of struma ovarii differs from that of mature cystic teratomas where struma ovarii consist of amber-colored thyroid tissue, with hemorrhage, necrosis, and fibrosis. In this article, a case of cystic struma ovarii with macrocystic change is presented. Molecular analysis of tissues obtained from both the malignant struma ovarii and thyroid gland was performed. The diagnosis is histologic and retrospective after pelvic surgery. Struma ovarii is a rare teratoma of the ovary that may contain functional thyroid follicular tissue, among others. Struma ovarii causes overt thyrotoxicosis only rarely, depending on the amount of follicular tissue present in the neoplasia. Etiology. Gynecol. Case presentation: A 17-year-old patient was diagnosed with papillary thyroid cancer in struma ovarii. 1. Struma ovarii is a rare ovarian tumor that was first described in 1899. Patients may also experience expanding abdominal growth and a fluid wave consistent with ascites. Matsuki M, Kaji Y, Matsuo M et-al. 1997;43 (1): 68-72. Struma ovarii concurrently occurring with other ovarian epithelial tumors has been rarely reported. We identified 10 such cases in our files. The tumor may present as a large abdominal mass, which can be palpable on examination depending upon size and location. Magnetic resonance imaging findings may be more characteristic: The cystic spaces demonstrate both high and low signal intensity on T1- and T2-weighted images. Introduction: Struma ovarii accounts for 2% of mature teratomas. Br J Radiol. Introduction. Approximately 5-8% of cases can show symptoms or signs of thyrotoxicosis. 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