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Bashank N, Farghaly H, Hassanein S, Abdel-Tawab M, Wahman M, Mahmoud H. Rare sites of metastases in patients with differentiated thyroid carcinoma and added value of SPECT/CT over planar whole body radioactive iodine scan. Eur J Hybrid Imaging 2022; 6:34. [DOI: 10.1186/s41824-022-00155-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Accepted: 10/24/2022] [Indexed: 11/29/2022] Open
Abstract
Abstract
Background
Being aware of the unusual or rare location of thyroid metastases helps in early diagnosis and proper patient management. Rare metastases (RM) can be missed resulting in diagnostic pitfalls and delayed treatment. The use of single-photon emission computed tomography/computed tomography (SPECT/CT) imaging in the follow-up of differentiated thyroid cancer (DTC) patients provides precise anatomical localization and characterization of RM that may be missed or misinterpreted in planar whole body iodine-131 (WBI) scan. There is a lack of knowledge about dealing with such patients, the treatment they should receive, and therapy response due to the rarity of such cases. In this work, we reported these rare cases increasing awareness about them and their methods of treatment with response to therapy and evaluated the added value of SPECT/CT imaging in changing patients’ management.
Materials and methods
In this study we reviewed all patients with DTC referred to our unit either for initial radioactive iodine-131 therapy (RAIT) or under follow-up from January 2019 to January 2022. When a suspected lesion was detected in a conventional planar WBI scan whether follow-up scan or post-therapeutic scan, SPECT/CT was acquired immediately in the same session for that region. Additional imaging modalities were performed for confirmation. Response to the given treatment either disease progression (DP) or favorable response which include complete response (CR), partial regression (PR) and stable disease (SD) recorded for each patient.
Results
Two hundred and forty patients with DTC referred to our unit over a three-year period (from January 2019 to January 2022) were reviewed. Forty patients developed lung and bone distant metastases. Twenty-one patients were thought to have metastases at unusual sites. Due to incomplete data (no SPECT/CT pictures or confirmatory imaging), 6/21 patients were eliminated. We studied 15 patients with RM (9 females, 6 males) with a median age of 52 years (range 27–79). All patients received the initial RAIT after thyroidectomy in addition to other therapeutic modalities, e.g., radiotherapy (RTH), chemotherapy (CTH) or surgical tumor excision after detection of RM. Ten out of 15 patients (66.67%) showed favorable response to therapy (2 patients had CR, 6 patients had PR and 2 patients had SD), whereas only 5 patients had DP. Additional SPECT/CT changed management in 10/15 patients (66, 67%) of patients.
Conclusion
RM identification is mandatory to avoid misdiagnosis and delayed therapy. Increasing the awareness about such rare cases allows for better management. SPECT/CT could significantly impact patients' management through its precise anatomic localization and lesion characterization.
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Nervo A, Retta F, Ragni A, Piovesan A, Gallo M, Arvat E. Management of Progressive Radioiodine-Refractory Thyroid Carcinoma: Current Perspective. Cancer Manag Res 2022; 14:3047-3062. [PMID: 36275786 PMCID: PMC9584766 DOI: 10.2147/cmar.s340967] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Accepted: 10/13/2022] [Indexed: 11/23/2022] Open
Abstract
Patients with thyroid cancer (TC) usually have an excellent prognosis; however, 5-10% of them develop an advanced disease. The prognosis of this subgroup is still favourable if the lesions respond to radioactive iodine (RAI) treatment. Nearly two-thirds of advanced TC patients become RAI-refractory (RAI-R), and their management is challenging. A multidisciplinary approach in the context of a tumour board is essential to define a personalized strategy. Systemic therapy is not always the best option. In case of slow neoplastic growth and low tumour burden, active surveillance may represent a valuable choice. Local approaches might be considered if the disease progression is limited to a single or few lesions, also in combination and during systemic therapy. Antiresorptive treatment may be started in presence of bone metastases. In case of rapid and/or symptomatic progression involving multiple lesions and/or organs, systemic therapy has to be considered, in absence of contraindications. The multi-kinase inhibitors (MKIs) lenvatinib and sorafenib are currently available as first-line treatment for advanced progressive RAI-R TC. Among second-line options, cabozantinib has been recently approved in RAI-R TC who progressed during MKIs targeting the vascular endothelial growth factor receptor (VEGFR). In the last few years, next-generation sequencing (NGS) assays have been increasingly employed, permitting identification of the genetic alterations harboured by TC, with a significant impact on patients' management. Novel selective targeted therapies have been introduced for the treatment of RAI-R TC in selected cases: REarranged during Transfection (RET) inhibitors (selpercatinib and pralsetinib) and Tropomyosin Receptor Kinase (TRK) inhibitors (larotrectinib and entrectinib) have recently expanded the panorama of the therapeutic options. Moreover, immune checkpoint inhibitors (ICIs) have shown promising results, and they are still under investigation.
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Affiliation(s)
- Alice Nervo
- Oncological Endocrinology Unit, Department of Medical Sciences, Città Della Salute e Della Scienza Hospital, University of Turin, Turin, Italy,Correspondence: Alice Nervo, Oncological Endocrinology Unit, Department of Medical Sciences, Città Della Salute e Della Scienza Hospital, University of Turin, Via Genova 3, Turin, 10126, Italy, Tel +390116336611, Fax +390116334703, Email
| | - Francesca Retta
- Oncological Endocrinology Unit, Department of Medical Sciences, Città Della Salute e Della Scienza Hospital, University of Turin, Turin, Italy
| | - Alberto Ragni
- Endocrinology and Metabolic Diseases Unit, AO SS. Antonio e Biagio e Cesare Arrigo Hospital, Alessandria, Italy
| | - Alessandro Piovesan
- Oncological Endocrinology Unit, Department of Medical Sciences, Città Della Salute e Della Scienza Hospital, University of Turin, Turin, Italy
| | - Marco Gallo
- Endocrinology and Metabolic Diseases Unit, AO SS. Antonio e Biagio e Cesare Arrigo Hospital, Alessandria, Italy
| | - Emanuela Arvat
- Oncological Endocrinology Unit, Department of Medical Sciences, Città Della Salute e Della Scienza Hospital, University of Turin, Turin, Italy
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Takeda E, Kimura J, Okabayashi T, Sui K, Tabuchi M, Murokawa T, Iwata J. Clinicopathological features and surgical outcomes of pancreatic metastasis from thyroid cancer. Am J Surg 2022; 224:856-862. [DOI: 10.1016/j.amjsurg.2022.04.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Revised: 03/06/2022] [Accepted: 04/04/2022] [Indexed: 11/15/2022]
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Okamoto T. Malignant biliary obstruction due to metastatic non-hepato-pancreato-biliary cancer. World J Gastroenterol 2022; 28:985-1008. [PMID: 35431494 PMCID: PMC8968522 DOI: 10.3748/wjg.v28.i10.985] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2021] [Revised: 07/03/2021] [Accepted: 02/16/2022] [Indexed: 02/06/2023] Open
Abstract
Malignant biliary obstruction generally results from primary malignancies of the pancreatic head, bile duct, gallbladder, liver, and ampulla of Vater. Metastatic lesions from other primaries to these organs or nearby lymph nodes are rarer causes of biliary obstruction. The most common primaries include renal cancer, lung cancer, gastric cancer, colorectal cancer, breast cancer, lymphoma, and melanoma. They may be difficult to differentiate from primary hepato-pancreato-biliary cancer based on imaging studies, or even on biopsy. There is also no consensus on the optimal method of treatment, including the feasibility and effectiveness of endoscopic intervention or surgery. A thorough review of the literature on pancreato-biliary metastases and malignant biliary obstruction due to metastatic non-hepato-pancreato-biliary cancer is presented. The diagnostic modality and clinical characteristics may differ significantly depending on the type of primary cancer. Different primaries also cause malignant biliary obstruction in different ways, including direct invasion, pancreatic or biliary metastasis, hilar lymph node metastasis, liver metastasis, and peritoneal carcinomatosis. Metastasectomy may hold promise for some types of pancreato-biliary metastases. This review aims to elucidate the current knowledge in this area, which has received sparse attention in the past. The aging population, advances in diagnostic imaging, and improved treatment options may lead to an increase in these rare occurrences going forward.
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Affiliation(s)
- Takeshi Okamoto
- Department of Gastroenterology, St. Luke’s International Hospital, Chuo-ku 104-8560, Tokyo, Japan
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Blossey RD, Kleine-Döpke D, Ringe KI, Pöhnert D, Ringe B, Klempnauer J, Beetz O. Recurrent Hurthle cell thyroid carcinoma does not preclude long-term survival: a case report and review of the literature. J Med Case Rep 2021; 15:399. [PMID: 34376229 PMCID: PMC8356425 DOI: 10.1186/s13256-021-02987-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2021] [Accepted: 06/28/2021] [Indexed: 11/22/2022] Open
Abstract
Background Follicular thyroid carcinoma is the second most common malignancy of the thyroid gland. In 2016, the so-called Hurthle cell thyroid carcinoma, formerly known as the oxyphilic variant of the follicular thyroid carcinoma, was reclassified by the World Health Organization as a separate pathological entity, which accounts for approximately 3% of all thyroid cancers. Although Hurthle cell thyroid carcinomas are known for their more aggressive tumor biology, metastases are observed in a minority of cases, and long-term survival can be expected. However, disseminated disease is often associated with poor outcome. Case presentation In the presented case, a 63-year-old Caucasian female was incidentally diagnosed with Hurthle cell thyroid carcinoma after undergoing hemithyroidectomy for a nodular goiter. Following completion thyroidectomy, two courses of radioactive iodine therapy were administered. After 4 years of uneventful follow-up, the patient gradually developed metastases in five different organs, with the majority representing unusual sites, such as heart, kidney, and pancreas over a course of 14 years. The lesions were either treated with radioactive iodine therapy or removed surgically, depending on iodine avidity. Conclusion Follicular and Hurthle cell thyroid carcinoma are known to potentially spread hematogenously to typical sites, such as lung or bones, however; unusual metastatic sites as presented in our case can also be observed. A search of the literature revealed only scattered reports on patients with multiple metastases in unusual locations. Furthermore, the observed long-term survival of our patient is contradictory to the existing data. As demonstrated, recurrent disease may appear years after the initial diagnosis, emphasizing the importance of consistent aftercare. Radioactive iodine therapy, extracorporeal radiation therapy, and surgical metastasectomy are central therapeutic components. In summary, our case exemplifies that thorough aftercare and aggressive treatment enables long-term survival even in recurrent Hurthle cell thyroid carcinoma displaying unusual multisite metastases.
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Affiliation(s)
- Richard David Blossey
- Department of General, Visceral and Transplant Surgery, Hannover Medical School, Carl-Neuberg-Strasse 1, 30625, Hannover, Lower Saxony, Germany.
| | - Dennis Kleine-Döpke
- Department of General, Visceral and Transplant Surgery, Hannover Medical School, Carl-Neuberg-Strasse 1, 30625, Hannover, Lower Saxony, Germany
| | - Kristina Imeen Ringe
- Department of Diagnostic and Interventional Radiology, Hannover Medical School, Hannover, Germany
| | - Daniel Pöhnert
- Department of General, Visceral and Transplant Surgery, Hannover Medical School, Carl-Neuberg-Strasse 1, 30625, Hannover, Lower Saxony, Germany
| | - Bastian Ringe
- Department of General, Visceral and Transplant Surgery, Hannover Medical School, Carl-Neuberg-Strasse 1, 30625, Hannover, Lower Saxony, Germany
| | - Jürgen Klempnauer
- Department of General, Visceral and Transplant Surgery, Hannover Medical School, Carl-Neuberg-Strasse 1, 30625, Hannover, Lower Saxony, Germany
| | - Oliver Beetz
- Department of General, Visceral and Transplant Surgery, Hannover Medical School, Carl-Neuberg-Strasse 1, 30625, Hannover, Lower Saxony, Germany
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Nervo A, Ragni A, Retta F, Calandri M, Gazzera C, Gallo M, Piovesan A, Arvat E. Interventional Radiology Approaches for Liver Metastases from Thyroid Cancer: A Case Series and Overview of the Literature. J Gastrointest Cancer 2021; 52:823-832. [PMID: 33999355 PMCID: PMC8376701 DOI: 10.1007/s12029-021-00646-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/06/2021] [Indexed: 11/25/2022]
Abstract
Background Liver metastases (LMs) from thyroid cancer (TC) are relatively uncommon in clinical practice and their management is challenging. Interventional radiology loco-regional treatments (LRTs), including radiofrequency ablation (RFA) and trans-arterial chemoembolization (TACE), have been successfully employed to treat LMs from various types of cancer. Methods We analyzed the role of LRTs in the management of unresectable LMs from differentiated and medullary TCs performed at our institution from 2015 to 2020. A review of the available English literature regarding this topic was also performed. Results Six hepatic LRTs were performed in 4 TC patients with LMs, in 2 cases after the start of treatment with a tyrosine kinase inhibitor (TKI). A partial response was obtained in 2 patients; the diameter of the largest targeted lesion was 18 mm in both of them. The remaining procedures were performed on larger lesions and a stable disease was achieved in all but one case. Acute LRT-related complications were transient and mild. In literature, the largest studies were focused on TACE in LMs from MTC, showing good tolerance and remarkable disease control, especially in case of limited liver tumour involvement. Conclusion LRTs for LMs represent a valuable option for the treatment of metastatic TC in case of isolated hepatic progression or for symptoms relief, also after the start of TKI treatment as part of a multimodal approach. The best disease control is obtained when hepatic metastatic burden is limited. These procedures are generally well tolerated; however, a cautious multidisciplinary selection of the candidates is mandatory.
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Affiliation(s)
- Alice Nervo
- Oncological Endocrinology Unit, Department of Medical Sciences, Città Della Salute E Della Scienza Hospital, University of Turin, Turin, Italy
| | - Alberto Ragni
- Oncological Endocrinology Unit, Department of Medical Sciences, Città Della Salute E Della Scienza Hospital, University of Turin, Turin, Italy
| | - Francesca Retta
- Oncological Endocrinology Unit, Department of Medical Sciences, Città Della Salute E Della Scienza Hospital, University of Turin, Turin, Italy
| | - Marco Calandri
- Diagnostic Imaging and Interventional Radiology Department, Città Della Salute E Della Scienza Hospital, University of Turin, Turin, Italy
| | - Carlo Gazzera
- Diagnostic Imaging and Interventional Radiology Department, Città Della Salute E Della Scienza Hospital, University of Turin, Turin, Italy
| | - Marco Gallo
- Oncological Endocrinology Unit, Department of Medical Sciences, Città Della Salute E Della Scienza Hospital, University of Turin, Turin, Italy
- Endocrinology and Metabolic Diseases Unit, AO SS. Antonio E Biagio E Cesare Arrigo Hospital, Alessandria, Italy
| | - Alessandro Piovesan
- Oncological Endocrinology Unit, Department of Medical Sciences, Città Della Salute E Della Scienza Hospital, University of Turin, Turin, Italy
| | - Emanuela Arvat
- Oncological Endocrinology Unit, Department of Medical Sciences, Città Della Salute E Della Scienza Hospital, University of Turin, Turin, Italy
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Dorovinis P, Machairas N, Kykalos S, Stamopoulos P, Agrogiannis G, Nikiteas N, Sotiropoulos GC. Staged Surgical Resection of Primary Pulmonary Synovial Sarcoma with Synchronous Multiple Pancreatic Metastases: Report of a Rare Case and Review of the Literature. J Gastrointest Cancer 2021; 52:1151-1155. [PMID: 33616842 DOI: 10.1007/s12029-021-00604-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/03/2021] [Indexed: 11/24/2022]
Affiliation(s)
- Panagiotis Dorovinis
- Department of Propaedeutic Surgery, National and Kapodistrian University of Athens, Medical School, Athens, Greece
| | - Nikolaos Machairas
- Department of Propaedeutic Surgery, National and Kapodistrian University of Athens, Medical School, Athens, Greece.
| | - Stylianos Kykalos
- Department of Propaedeutic Surgery, National and Kapodistrian University of Athens, Medical School, Athens, Greece
| | - Paraskevas Stamopoulos
- Department of Propaedeutic Surgery, National and Kapodistrian University of Athens, Medical School, Athens, Greece
| | - George Agrogiannis
- Department of Pathology, National and Kapodistrian University of Athens, Medical School, Athens, Greece
| | - Nikolaos Nikiteas
- Department of Propaedeutic Surgery, National and Kapodistrian University of Athens, Medical School, Athens, Greece
| | - Georgios C Sotiropoulos
- Department of Propaedeutic Surgery, National and Kapodistrian University of Athens, Medical School, Athens, Greece
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Machairas N, Kostakis ID, Schizas D, Kykalos S, Nikiteas N, Sotiropoulos GC. Meta-analysis of laparoscopic versus open liver resection for intrahepatic cholangiocarcinoma. Updates Surg 2020; 73:59-68. [PMID: 33219937 DOI: 10.1007/s13304-020-00930-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Accepted: 11/11/2020] [Indexed: 02/06/2023]
Abstract
Intrahepatic cholangiocarcinoma (iCCA) is a rare and aggressive hepatic malignancy. An up-to-date systematic review and meta-analysis was conducted aiming to compare outcomes between laparoscopic (LLR) and open liver resection (OLR) for patients with iCCA. A systematic literature search of Medline, Scopus, Google Scholar, and Cochrane databases was performed. A total of 8 studies comprising 2872 patients, who underwent LLR or OLR for iCCA, were included in our meta-analysis. LLR patients had smaller tumors [mean difference (MD): - 1.17 cm, 95% confidence intervals (CI) - 1.77 to - 0.57, p = 0.0001], underwent major resections less frequently [risk ratio (RR): 0.75, 95% CI 0.67-0.83, p < 0.00001] and R0 resections more frequently (RR: 1.05, 95% CI 1.01-1.09, p = 0.01), while lymphadenectomy was less common in the laparoscopic group (RR: 0.73, 95% CI 0.58-0.92, p = 0.007). The LLR group presented reduced blood loss (MD: - 270.16 ml, 95% CI - 381.53 to - 32.79, p = 0.002), need for transfusion (RR: 0.39, 95% CI 0.21-0.73, p = 0.003), overall morbidity (RR: 0.58, 95% CI 0.4-0.83, p = 0.003) and hospital stay (MD: - 3.48 days, 95% CI: - 6.94 to - 0.02, p = 0.05) compared to the OLR group. No differences were shown in operative time (MD: 1.6 min, 95% CI - 34.17-37.37, p = 0.93), major morbidity (RR: 0.65, 95% CI 0.38-1.11, p = 0.12), mortality (RR: 1.42, 95% CI 0.13-15.07, p = 0.77), overall (HR: 0.9, 95% CI 0.59-1.38, p = 0.63) and relapse-free survival (HR: 0.77, 95% CI 0.5-1.16, p = 0.21) between the two groups. LLR seems to benefit patients with iCCA in terms of short-term outcomes, whilst long-term outcomes are comparable among the two approaches.
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Affiliation(s)
- Nikolaos Machairas
- 2nd Department of Propaedeutic Surgery, Laiko General Hospital, National and Kapodistrian University of Athens Medical School, 17 Agiou Thoma Street, 11527, Athens, Greece. .,Department of HPB Surgery and Liver Transplant, Royal Free Hospital, Royal Free London NHS Foundation Trust, London, UK.
| | - Ioannis D Kostakis
- Department of HPB Surgery and Liver Transplant, Royal Free Hospital, Royal Free London NHS Foundation Trust, London, UK
| | - Dimitrios Schizas
- 1st Department of Surgery, National and Kapodistrian University of Athens, Athens, Greece
| | - Stylianos Kykalos
- 2nd Department of Propaedeutic Surgery, Laiko General Hospital, National and Kapodistrian University of Athens Medical School, 17 Agiou Thoma Street, 11527, Athens, Greece
| | - Nikolaos Nikiteas
- 2nd Department of Propaedeutic Surgery, Laiko General Hospital, National and Kapodistrian University of Athens Medical School, 17 Agiou Thoma Street, 11527, Athens, Greece
| | - Georgios C Sotiropoulos
- 2nd Department of Propaedeutic Surgery, Laiko General Hospital, National and Kapodistrian University of Athens Medical School, 17 Agiou Thoma Street, 11527, Athens, Greece
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Yoon JH, Jeon MJ, Kim M, Hong AR, Kim HK, Shin DY, Kim BH, Kim WB, Shong YK, Kang HC. Unusual metastases from differentiated thyroid cancers: A multicenter study in Korea. PLoS One 2020; 15:e0238207. [PMID: 32841270 PMCID: PMC7447021 DOI: 10.1371/journal.pone.0238207] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Accepted: 08/11/2020] [Indexed: 12/14/2022] Open
Abstract
Background Although infrequent, distant metastasis from differentiated thyroid cancer is the main cause of mortality in patients and mostly involves the lung, bone, and brain. Distant metastases to other sites in differentiated thyroid cancer patients are rare, thus, the clinical course of unusual metastases has not been adequately researched. In the present study, the clinico-pathological findings and treatment outcomes of unusual metastases in differentiated thyroid cancer patients in Korea were evaluated. Patients and methods We retrospectively reviewed the medical records of differentiated thyroid cancer patients with unusual metastases in four Korean tertiary hospitals (Chonnam National University Hwasun Hospital, Asan Medical Center, Busan National University Hospital, Severance Hospital). Unusual metastases were diagnosed using (1) cytology or histology and/or (2) imaging studies including fluorodeoxyglucose F 18 positron emission tomography/computed tomography and/or iodine 131 whole body scans with simultaneously elevated serum levels of thyroglobulin. The pathological findings of primary thyroid cancer, diagnostic method for unusual metastases, and treatment responses of unusual metastases were examined. Results In all, 25 unusual metastatic foci of 19 patients were analyzed; 13 patients (68.4%) had papillary thyroid carcinoma including 4 follicular variant papillary thyroid carcinomas. The median time interval between the first diagnosis of primary thyroid cancer and unusual metastases diagnosis was 110 months (11.0–138.0 months). Only 4 patients (21.1%) had synchronous unusual metastases and 6 patients (31.6%) were symptomatic. Unusual metastases included 19 metastases to solid organs (6 to kidney, 5 to liver, 4 to pancreas, 3 to adrenal gland, and 1 to ovary) and 6 to the skin and muscles. Unusual metastases were pathologically proven in 10 patients (52.6%) and 11 of 16 patients (68.8%) who received iodine 131 whole body scans had radioiodine-refractory differentiated thyroid cancer. Among 5 patients treated with tyrosine kinase inhibitors, 4 treated with lenvatinib showed stable disease or a partial response at the first treatment response. Six patients (31.6%) died due to disease progression during the median 20.0-month follow-up period (11.0–55.0 months). Conclusion Unusual metastases from differentiated thyroid cancer are thought to be underestimated due to disease rarity and their metachronous nature with other distant metastases. The most of unusual metastases in differentiated thyroid cancer patients are existed with usual distant metastasis and clinical outcomes of those could not be significantly different from the prognosis of usual distant metastasis.
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Affiliation(s)
- Jee Hee Yoon
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Chonnam National University Medical School, Gwangju, South Korea
| | - Min Ji Jeon
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Mijin Kim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Biomedical Research Institute, Pusan National University Hospital, Pusan, South Korea
| | - A. Ram Hong
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Chonnam National University Medical School, Gwangju, South Korea
| | - Hee Kyung Kim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Chonnam National University Medical School, Gwangju, South Korea
| | - Dong Yeob Shin
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, South Korea
| | - Bo Hyun Kim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Biomedical Research Institute, Pusan National University Hospital, Pusan, South Korea
| | - Won Bae Kim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Young Kee Shong
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Ho-Cheol Kang
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Chonnam National University Medical School, Gwangju, South Korea
- * E-mail:
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