Papillary thyroid carcinoma in Struma Ovarii.

Struma Ovarii is one of the types of mature teratoma, with predominant thyroid tissue (>50%). It occurs in 1% of all cases of ovarian tumors and in 2.7% of dermoid tumors. There are no specific clinical, radiological or serum markers for this rare pathology. Rarely it may be accompanied by ascites and the increased level of CA-125. In general Stuma Ovarii is clinically defined as an ovarian malignancy. It is diagnosed only by histopathological examination of the surgical material. Diagnosis of Struma Ovarii dictates the need for advanced research of the thyroid. Struma Ovarii is mostly benign. Its malignant transformation occurs in only 5% of all cases, That leads to further management planning analogous to the treatment of thyroid cancer. The case of malignant Struma Ovarii of the 50-year-old woman, which led to total thyroidectomy and radioactive iodine therapy - is described.

Extensive peritoneal implant metastases of malignant struma ovarii treated by thyroidectomy and 131I therapy: A case report.

RATIONALE: Malignant struma ovarii is extremely rare in the clinic. The diagnosis and modalities of treatment are still controversial. Here we describe a case of extensive peritoneal implant metastasis originating from malignant struma ovarii discovered 14 years after ovariectomy and chemotherapy. PATIENT CONCERNS: A 48-year-old female was admitted to our clinic due to hematochezia with a past history of left malignant struma ovarii. Enhanced computed tomography (CT) examination suggested multiple metastasis nodules in the abdomen and pelvic cavity. DIAGNOSES: Laparoscopy biopsy results of intraperitoneal nodules showed a metastasis of papillary thyroid carcinoma. While pathological examination after total thyroidectomy showed no definite malignant tumor component in the thyroid tissue. Finally, combined with the patient's past history of malignant struma ovarii, peritoneal implantation metastasis derived from the malignant struma ovarii was diagnosed. INTERVENTIONS: The patient was treated by total thyroidectomy and iodine 131 (I) therapy. Post-therapy iodine scan and the single-photon emission computed tomography/computed tomography (SPECT/CT) fusion image showed iodine uptake in the distal descending colon, sigmoid colon, rectal lesions, and a larger lesion in the liver. OUTCOME: After treatment, although the thyroid globulin remained at a high level 3 months after treatment, the patient's hematochezia was relieved. LESSONS: Therefore, thyroidectomy followed by adjuvant I treatment should be recommended in patients with malignant struma ovarii as metastatic risk is difficult to predict based on histopathologic examination.

Papillary thyroid cancer located in malignant struma ovarii with omentum metastasis: a case report and review of the literature.

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 mass. Patient was asymptomatic at presentation. A follow-up ultrasound confirmed the presence of a 3-cm mass in the left adnexa. Patient underwent a cytoreductive surgery (hysterectomy, bilateral salpingectomy and oophorectomy, omentectomy, appendectomy, and pelvic lymphadenectomy). Histopathology revealed a malignant struma ovarii with a focus of papillary thyroid carcinoma and the omentum metastasis. The patient with stage FIGO IIIc received 6 cycles of paclitaxel/carboplatin regimen after surgery. The patient subsequently had a thyroid scan that was normal with normal thyroid function. At a follow-up of 12 months, she is alive, in good clinical condition, and disease-free. CONCLUSIONS: Because of the rarity of these tumors and their lack of firm prognostic factors, treatment decisions should be made individually, based on pathologic and clinical parameters.

METASTATIC RADIOIODINE AVID STRUMA OVARII ASSOCIATED WITH PSEUDO-MEIGS' SYNDROME.

We report a case of 21 years old lady who presented with ascites, left adnexal mass and elevated CA-125. With suspicion of ovarian malignancy, she underwent left salpingo-oophorectomy with omental biopsy. Histopathology revealed: 'follicular variant of papillary thyroid carcinoma arising in struma ovarii' with metastatic papillary thyroid carcinoma in omental and peritoneal nodules. Patient underwent total thyroidectomy followed by radioactive iodine therapy for metastatic omental and peritoneal disease. Post-therapy whole body scan, revealed extensive I-131 avid disease metastatic disease involving the chest, abdomen, pelvis and the musculoskeletal system. Patient was treated with multiple doses of high dose radioactive iodine. She became symptom free on supra-physiologic doses of oral thyroxin however her high thyroglobulin levels and residual radioiodine avid metastatic disease required further treatment. In literature a few cases of struma ovarii have been reported with elevated CA-125 and associated pseudo-Meigs' syndrome. The treatment for this rare disease is still not standardized and poses a therapeutic challenge. Our case emphasizes the need for a multidisciplinary approach for managing struma ovarii.

Coexistence of malignant struma ovarii and cervical papillary thyroid carcinoma.

CONTEXT: Struma ovarii is an uncommon monodermal teratoma in which thyroid tissue is the predominant element. Malignant transformation of struma ovarii is an even rarer occurrence. CASE PRESENTATION: We describe a 42-year-old woman who underwent a total abdominal hysterectomy and bilateral salpingo-oophorectomy for a symptomatic left pelvic mass. Histology revealed malignant struma ovarii with classical papillary thyroid carcinoma expression. Ultrasonography of the cervical neck showed thyroid micronodules and a dominant 1-cm nodule in the left thyroid lobe. As the ovarian tumor was large, the patient underwent a total thyroidectomy with the intention of administering ¹³¹I therapy in an adjuvant setting. Histology of the cervical thyroid gland revealed bilateral multifocal papillary thyroid carcinoma with extrathyroidal extension and perithyroidal lymph node metastasis. METHODS: Morphological (microscopy), immunohistochemical (Hector Battifora mesothelial cell 1, cytokeratin-19, galectin-3), and molecular (BRAF V600E, RAS, RET-PTC) characteristics and clonality analysis of the cervical thyroid and ovarian tumors were explored to distinguish them as separate malignancies. RESULTS: The thyroid-type tumors from the cervical gland and ovary were discordant in terms of tissue histology and level of cytokeratin-19 expression. The clinical features and tumor profile results supported the independent existence of these two embryologically related, although topographically distinct, malignancies. CONCLUSION: Our findings provided support for synchronous, albeit distinct, primary tumors in the ovary and cervical thyroid. "Field cancerization" and early genomic instability may explain multifocality in all thyroid-type tissue. In this regard, patients with malignant struma ovarii should undergo imaging of their thyroid gland for coexisting disease and thyroidectomy recommended for suspected malignancy or in preparation for radioiodine therapy.

[Peritoneal strumosis: an extension study with (99m)Tc-pertecnectate]. / Strumosis peritoneal: estudio de extensión con (99m)Tc-pertecnectato.

We report the case of a 35-year-old nulliparous woman, with a previous history of ovarian cystectomy diagnosed 3 years earlier due a struma ovarii type of monodermal teratoma in the right ovary and a hemorrhagic cyst in the left ovary. Progressive growth of the left adnexal mass was observed in the periodic medical check-ups. Due to this, a second laparoscopy was performed and, based on the findings, a left ovarian cystectomy, right salpingectomy and resection of multiple peritoneal implants were carried out. The pathology diagnosis was left struma ovarii and peritoneal strumosis. A whole body and SPECT/CT scan with (99m)Tc-pertechnetate was performed to detect possible peritoneal implants. This study helped to make the therapeutic decision.

Primary strumal carcinoid tumor of the ovary with multiple bone and breast metastases.

Although primary carcinoid tumor of the ovary is an extremely rare neoplasm, survival is excellent if the disease is confined to one ovary. Herein, we present a case of primary strumal carcinoid tumor of the ovary, stage IA, borderline malignancy, in a 34-year-old woman. Histological findings of the right ovary indicated higher atypical nuclei, higher mitotic rate and focal necrosis of tumorous cells in some areas, findings that are compatible with atypical carcinoid of the lung. Immunohistochemical staining was positive for synaptophysin, neuron-specific enolase, chromogranin A, Ki-67, topoisomerase IIalpha, peptide YY, and thyroglobulin. Three and a half years postoperatively, multiple bone and breast metastases were found and anticancer chemotherapy was ineffective. The results in the present case indicate that an ovarian carcinoid tumor found to be 'atypical carcinoid' according to pulmonary carcinoid criteria or immunohistochemical staining (i.e. highly positive for topoisomerase IIalpha and Ki-67) may have a poor prognosis.

Predominant Brenner tumor combined with struma ovarii containing a papillary microcarcinoma associated with benign peritoneal strumosis: report of a case and histologic features.

Brenner tumor and struma ovarii, two uncommon ovarian tumors arising alone or together with dermoid cysts or adenomas, are both rare entities. Both tumors rarely become malignant and rarely metastasize. Few published reports describe coexisting Brenner tumor and malignant struma ovarii. Patients in whom these malignancies coexist only occasionally have peritoneal spreading, strumosis, or a history of thyrotoxicosis. The patient we describe, a 74-year-old woman, presented with a 2 months' history of lower abdominal pain and episodic intestinal subocclusion due to a complex pelvic mass. The mass consisted predominantly of a Brenner tumor associated with struma ovarii containing a single small island of thyroid tissue that had undergone malignant transformation into a well-differentiated papillary carcinoma and also normal thyroid tissue that had spread to the peritoneum. The patient underwent radical surgical treatment and after 7 years follow-up is disease free.

Malignant struma ovarii: a case report.

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-operatively, she was diagnosed with a malignant struma ovarii through the usage of histopathological criteria similar to the guidelines for primary thyroid gland disease. The patient was subsequently performed left salpingo-oopherectomy and retroperitoneal pelvic lympadenectomy for re-staging. Although, left ovary and lymph nodes were histopathologically normal, she was offered thyroidectomy but she refused to accept the offer. Thyroglobulin level was monitored in the post-operative period. She is free of the disease for 18 months.

Metastasis of malignant struma ovarii to the lumbar spine.

A 32-year-old woman with a solitary metastasis to the lumbar spine from a struma ovarii was treated surgically with tumour extirpation and anterior spinal reconstruction. Metastasis may occur when a patient has had prior surgery to remove this rare tumour.

Metastatic struma ovarii: the burden of truth.

A 58-year-old woman was found to have metastatic thyroid cancer in her liver. This was identified when she was investigated for upper abdominal pain and underwent biopsy of hepatic lesions. She had no palpable thyroid nodule and had a normal ultrasound of the thyroid. Previously, both ovaries had been removed because of tumors. The pathologic findings in one of the ovaries could not be recovered because the procedure was more than 40 years ago, when the patient was a teenager. By a process of elimination, a diagnosis of metastatic struma ovarii was established. Treatment of metastatic thyroid cancer from struma ovarii, including removal of the normal thyroid and administration of I-131, is presented.

Metastatic thyroid carcinoma in the presence of struma ovarii.

A 27-year-old woman presented with metastatic follicular carcinoma of thyroid cell type. Assessment was complicated by recent surgery for "benign" struma ovarii. She underwent total thyroidectomy which failed to show a neoplasm, leaving the struma ovarii as the likely source of the metastasis.

Malignant struma ovarii: an unusual presentation.

Malignant struma ovarii is a rare disease; only a few cases are well documented in the literature. Thus, the overall prognosis and modalities of treatment are still somewhat controversial. In this article, the authors report a case of malignant struma ovarii discovered 4 years after ovariectomy after metastasis to the lungs and bones. Review of the pathology of the ovarian struma did not reveal the classic criteria of malignancy, there were, however, many features considered to be atypical and thus suspicious. The patient was treated by total thyroidectomy followed by repetitive doses of 131I. However, because of difficulties in increasing the level of endogenous thyrotropin (TSH) because of functional thyroid metastases in such an advanced disease, recombinant human thyrotropin (rhTSH; Thyrogen, thyrotropin alpha, Genzyme Corporation, Cambridge, MA) was used before administration of radioiodine. With this therapeutic protocol, the patient is still clinically stable 2 years after diagnosis.

Functioning liver metastases on an I-131 whole-body scan: a case of malignant struma ovarii.

A 46-year-old women was examined for severe constipation. Pelvic examination revealed a large pelvic mass extending to the level of the umbilicus. Computed tomography showed a large multicystic, septated mass in the pelvis and a small amount of fluid in the cul de sac. In addition, multiple ill-defined, mixed-attenuation hepatic lesions were identified. A malignant ovarian neoplasm with liver metastases was considered, so the pelvic mass was resected. Interestingly, histopathologic analysis revealed malignant struma ovarii of the follicular type. Biopsy of the liver lesions confirmed metastatic disease with similar histopathologic findings. All thyroid laboratory values were in the normal range. The patient then had a total thyroidectomy to optimize thyroid ablation therapy with I-131. This revealed a small follicular adenoma but no evidence of cancer. An I-131 whole-body scan was performed and showed uptake in multiple functioning liver metastases.

Recombinant human thyrotropin for the diagnosis and treatment of a highly functional metastatic struma ovarii.

The optimal treatment of metastatic thyroid cancer that produces high amounts of thyroid hormone has not been well defined. A 46-yr-old woman presented with a follicular thyroid carcinoma arising from a struma ovarii with hepatic metastases. After the removal of both the struma and the thyroid gland, the liver metastases showed evidence of a high degree of hormonogenesis. Brain, chest, abdomen, and bone imaging was negative for additional metastases. Because iodine uptake by most thyroid carcinomas is quite low in the absence of high levels of ambient TSH, we used recombinant human TSH (rhTSH) (Thyrogen) to achieve a concentration of 131I activity in the tumor high enough for a significant cytotoxic effect. After rhTSH administration (0.9 mg im daily for 2 consecutive days), a 131I diagnostic whole body scan confirmed the existence of 17 discrete hepatic foci of 131I uptake. To calculate the amount of 131I that would deliver an absorbed radiation dose that would be optimally cytotoxic to the metastases (>8000 rad/lesion) and not to the normal liver, we performed lesion dosimetry. Analysis of dosimetric data showed that 15 of 17 lesions would receive an adequate radiation dose following the administration of 65 mCi of 131I. Additionally, we performed whole body dosimetry to assure that this dose would not cause bone marrow toxicity. The patient was reevaluated 6 months after therapy; the liver metastases showed significant, but partial, response. In conclusion, we used the combination of rhTSH with lesional and whole body dosimetry for the treatment of highly functional metastases from follicular thyroid carcinoma arising within a struma ovarii. This strategy can be applied to determine a safe and effective dose of 131I for the treatment of any thyroid cancer metastases that produce enough TH to preclude stimulation of endogenous pituitary TSH secretion.

Malignant struma ovarii: recurrence and response to treatment monitored by thyroglobulin levels.

A patient with malignant struma ovarii who had elevated thyroglobulin levels at the time of her original surgery was diagnosed with recurrence on the basis of progressive thyroglobulin level elevation while on thyroid suppressive therapy. Subsequent treatment with therapeutic doses of iodine-137 resulted in normalization of the elevated thyroglobulin level. The patient remains disease free on thyroid replacement.

Diagnosis and treatment of disseminated struma ovarii with malignant transformation.

Struma ovarii are specialized teratomas consisting of thyroid tissue. They may demonstrate all pathologic features seen in the thyroid gland. Malignant transformation of thyroid tissue in struma ovarii is uncommon and is rarely recurrent or metastatic. We report the diagnosis and treatment of a recurrent struma ovarii with malignant transformation, and intraperitoneal, retroperitoneal, and hepatic metastases.