• 대한세포병리학회지
• /
• 제10권1호
• /
• pp.43-53
• /
• 1999

We retrospectively reviewed the results of 1,850 fine needle aspiration cytology(FNAC) of thyroid nodules performed from 1990 to 1991 in the Department of Pathology, Seoul National University Hospital. Among 1,528 cases and 322 cases aspirated by clinicians and a pathologist, 465 cases(30.4%) and 13 cases(4.0%) of the aspirates were inadequate, respectively. In 227 cases, correlation of the FNAC diagnosis and histologic diagnosis was done. Excluding the inadequate cases, the sensitivity nor the detection of neoplasm(malignancy together with follicular adenoma) was 86.4% and the specificity was 70.7%. The overall diagnostic accuracy was 79.0%. There were 16 false-positive cases(7.0%), and 19 false-negative cases(8.4%). The predictive value of each cytologic diagnosis was 92% in papillary carcinoma, and 100%, in Hashimoto's thyroiditis. The expectancy of malignancy was 52.8% in "suspicious malignancy" and 26.7% in "atypical lesion".

• 대한두경부종양학회지
• /
• 제9권1호
• /
• pp.10-15
• /
• 1993

In this study. we studied the efficacy of CT scan in the diagnosis of the thyroid nodules. CT scan was useful in the identification of nodal metastasis. extracapsular spread and intrathoracic extension. and multiple cystic degeneration or calcification on CT scan suggested a high possibility of thyroid malignancy.

• 대한두경부종양학회지
• /
• 제27권2호
• /
• pp.198-203
• /
• 2011

Background and Objectives : Distinguishing benign from malignant lesion in thyroid noddex is important but clinically difficult. FNAB is the first investigation of choice. However, cytologic results are often indeterminable. In those cases, additional molecular biologic tests are helpful. If serologic tests are available to predict malignancy, it can be useful to fortify accurate diagnosis. We analyzed whether TSH or FreeT4 level could be used as a predictor of malignancy. Materials and Methods : From January 2008 to March 2009, 540 patients received one of thyroidectomy in a single center. We only included 167 patients from 18 to 65 years old without cardiopulmonary or renal disorders. All the patients were in euthyroid state and took no medications, which affect the thyroid function. We reviewed charts retrospectively to find out differences in TSH level and FreeT4 level between the benign and malignant groups. Results : In this study, all the patients with malignancy had the papillary cancer. In benign group, average TSH level came out to be 1.48mU/L, whereas the average TSH level of malignant group was 1.98 mU/L. Moreover, the higher the cancer stage was, the higher the TSH level was. Although we have adjusted factors that can affect TSH level(age, sex, race, goiter type), we still received the same result. The risk of malignant cancer increased in proportion with TSH level within the normal range. In free T4 level, there was no difference between benign and malignant group. Conclusion : We propose that TSH level can play a role as one of the predictors for thyroid cancer. However, there is limitation because all the patients with malignancy in this study have papillary cancer. Thus, we can apply this result only in papillary cancer, and we need more study for other types of thyroid cancer.

• 대한두경부종양학회지
• /
• 제15권1호
• /
• pp.66-69
• /
• 1999

Background and Objectives: It is critical to distinguish benign from malignant thyroid nodule and to select a patient for surgery. Even though the U/S study dose not make great contribution to diagnose a malignant thyroid nodule, it is widely used in the evaluation of anatomic feature of thyroid. The authors tried to estimate the efficacy of the U/S study in preoperative diagnosis of malignant thyroid nodule. Materials and Method: At the department of General Surgery of Ajou University, 75 patients who were operated after diagnosis with thyroid nodule by U/S study between July 1996 to June 1997 were retrospectively analyzed. By comparing the U/S impression that implies malignant thyroid nodule to FNAC and post-operative pathologic results ware as follows. Results: 1) Absence of cystic change, presence of internal hypoechogenicity, lobulation, calcification, thick and irregular halo, and nodule more than 4cm in diameter on U/S were considered significant statistically for the diagnosis of malignancy(Chi-square test, p<0.05) 2) Presence of internal hypoechogenicity or thick and irregular halo has the validity in Logistic regression analysis. 3) FNAC was done in 65 case. 19 case were malignant, 11 case were suspicious and 46 patients were benign (sensitivity 52.6%, specificity 87%). 4) The findings of U/S which are hypoechogenic and thick and irregular halo show 82% sensitivity and 97% specificity. In combination with the findings of FNAC that imply benign or suspicious lesions, the sensitivity was 100% and the specificity was 97%. Conclusion: This study suggest that the hypoechogenicity and thick and irregular halo on U/S are important information for the diagnosis of thyroid malignancy which were considered benign or suspicious after FNAC.

• 대한두경부종양학회지
• /
• 제40권1호
• /
• pp.1-5
• /
• 2024

The Bethesda System for Reporting Thyroid Cytopathology (TBSRCT) is crucial for cytopathologists to use a standardized, category-based reporting system for thyroid fine needle aspirations and is effective for clear communication with the referring physicians. The new Bethesda System for Reporting Thyroid Cytopathology, the third edition in 2023, provides several key updates. The most important update is the assignment of only single name for each of the six diagnostic categories: (I) nondiagnostic; (II) benign; (III) atypia of undetermined significance; (IV) follicular neoplasm; (V) suspicious for malignancy; and (VI) malignant. An implied risk of malignancy (ROM) for each of six categories has been updated based on extensively published data since the second edition of TBSRTC in 2017 and offers both an average ROM for each category and the expected range of cancer risk. Estimated final ROM after excluding "Noninvasive Follicular Thyroid Neoplasm with Papillary Like Nuclear Features (NIFTP)" for each of six categories has been updated based on the reported mean decreases in the ROM if excluding NIFTP. For atypia of undetermined significance (AUS) category, the subcategorization is simplified and more formalized into 2 subgroups, AUS-nuclear atypia or AUS-other, based on the implied ROM and molecular profiling. For the pediatric thyroid disease, pediatric ROMs and management algorithms are newly added for the same six reporting categories for this age group. New or revised disease nomenclatures including high-grade follicular-derived carcinoma has been updated according to the recently published 2022 World Health Organization Classification of Thyroid Neoplasms. Brand new two chapters are added including clinical perspectives and imaging studies (Chap. 13) and the use of molecular and other ancillary tests (Chap. 14). The atlas is updated with new images to illustrate more effectively for new disease entity and diagnostic criteria.

• Korean Journal of Radiology
• /
• 제20권1호
• /
• pp.158-165
• /
• 2019

Objective: Recent studies demonstrated that core needle biopsy (CNB) can effectively reduce the possibility of inconclusive results and prevent unnecessary diagnostic surgery. However, the effectiveness of CNB in patients with suspicious thyroid nodules has not been fully evaluated. This prospective study aimed to determine the potential of CNB to assess thyroid nodules with suspicious ultrasound (US) features. Materials and Methods: Patients undergoing CNB for thyroid nodules with suspicious features on US were enrolled between May and August 2016. Diagnostic performance and the incidence of non-diagnostic results, inconclusive results, conclusive results, malignancy, unnecessary surgery, and complications were analyzed. Subgroup analysis according to nodule size was performed. The risk factors associated with inconclusive results were evaluated using multivariate logistic regression analysis. Results: A total of 93 patients (102 thyroid nodules) were evaluated. All samples obtained from CNB were adequate for diagnosis. Inconclusive results were seen in 12.7% of cases. The diagnostic accuracy, sensitivity, specificity, positive predictive value, and negative predictive value for diagnosis of malignancy were 93.8%, 100%, 100%, 78.9%, and 95%, respectively. None of the patients underwent unnecessary surgery. The diagnostic performance was not significantly different according to nodule size. On multivariate logistic regression analysis, larger nodule size and shorter needle length were independent risk factors associated with inconclusive results. Conclusion: Samples obtained by CNB were sufficient for diagnosis in all cases and resulted in high diagnostic values and conclusive results in the evaluation of suspicious thyroid nodules. These findings indicated that CNB is a promising diagnostic tool for suspicious thyroid nodules.

• Nuclear Medicine and Molecular Imaging
• /
• 제40권2호
• /
• pp.132-140
• /
• 2006

Well-differentiated thyroid cancer is the most common endocrine malignancy with an increasing incidence. Most patients with well-differentiated thyroid caner have a favorable prognosis with high survival rate. While surgery and radioiodine therapy is sufficient treatment for the majority of patients with differentiated thyroid cancer, a minority of these patients experiences progressive, life-threatening growth and metastatic spread of the disease. Because there is no prospective controlled study to evaluate the differences of management of thyroid cancer, it is hard to choose the best treatment option. And there are still lots of controversies about the management of this disease, such as surgical extent, proper use of radioiodine for remnant ablation and therapy, use of rhTSH instead of withdrawal of thyroid hormone, long-term follow-up strategy, thyroglobulin as a tumor marker, etc. In this review, recent data related to these conflicting issues and recent advances in diagnosis, radioiodine therapy and long-term monitoring of well-differentiated thyroid cancer are summarized.

• 대한방사선기술학회지:방사선기술과학
• /
• 제38권2호
• /
• pp.145-153
• /
• 2015

갑상샘 결절은 임상에서 흔히 접하게 되는 내분비 질환이며, 검사방법의 발달과 함께 건강 검진을 목적으로 시행하는 갑상샘 초음파검사에서 우연히 발견되는 갑상샘 결절 환자는 급격히 증가하고 있다. 본 연구는 대상자의 일반적 특성과 갑상샘 초음파검사, 미세침흡인세포검사를 비교 분석하여 남 녀 성별에 따른 갑상샘 결절과 갑상샘 암의 빈도 관계에 대해 알아보고자 하였다. K건강검진병원을 내원한 20세 이상 성인에서 갑상샘 질환의 기왕력이 없는 총 32,973명을 대상으로 갑상샘 초음파검사를 시행하였다. 수검자가 작성한 문진표를 통하여 일반적 특성을 조사하였고, 갑상샘 초음파검사(갑상선 결절의 유무, 크기, 개수)와 미세침흡인세포검사를 통해 악성 빈도를 알아보았다. 갑상샘 초음파검사를 시행한 32,973명의 대상자 중 결절의 유병률은 남성에서 4,611명(26.1%) 여성에서 5,341명(34.9%)으로 여성이 남성보다 유의하게 높았으며, 남 녀 모두에서 연령증가에 따라 결절의 유병률이 유의하게 증가하였다(p < 0.05). 다결절 비율은 여성이 43.5%, 남성은 35.6%로 여성이 유의하게 높았으며, 남 녀 모두에서 연령이 증가함에 따라 유의하게 증가하였다(p < 0.05). 갑상샘 초음파검사로 선별된 악성을 시사하는 692명(남성 342명, 여성 350명)의 갑상샘 결절 환자를 대상으로 미세침흡인세포검사를 시행한 결과, 성별에 따른 악성 결절의 비율은 남성에서 33.3%, 여성에서 29.4%로 통계적으로 유의하지는 않았으나 남성에서 다소 높은 것으로 나타났다. 본 연구는 성인 남 녀를 대상으로 일반적 특성, 갑상샘 초음파검사, 미세침흡인세포검사를 비교 분석하였고, 일반적 특성에 따른 갑상샘 결절의 유병률, 다결절, 결절의 크기가 성별 및 연령별에서 유의한 상관관계가 나타났다. 또한, 성인 남성의 갑상샘 결절의 유병률이 여성과 비교하여 크게 낮지 않았으며, 결절의 악성 빈도가 남성이 여성보다 다소 높은 양상을 보여 남 녀 모두에게 갑상샘 초음파검사의 역할이 중요하다고 사료된다.

• 대한두경부종양학회지
• /
• 제16권1호
• /
• pp.52-57
• /
• 2000

Purpose: The purpose of the study was to evaluate the sensitivity, specificity and accuracy between the FNAC and intraopevative frozen biopsy based upon the Final histologic diagnosis. Method: Authors studied 232 cases of thyroid nodule operated at Department of Surgery, College of Medicine, Chosun University, from January 1992 to December 1998. The medical records of these patients were studied retrospectively. The cytology of FNAC and the frozen section was compared to the final histologic diagnosis. 232 cases were analysed in regard to correlation of FNAC diagnosis and Intraoperative frozen section with final pathology, preoperative thyroid scan, thyroid function test, ultrasonography, final histopathology of the specimens, and surgical operation methods. 174 cases who underwent FNAC for diagnosis before operation, and Intraoperative frozen-section biopsy were classified according to whether the clinical diagnosis was benign, suspicious or malignant and evaluated the specificity sensitivity and accuracy. Result: Comparing with final histopathology, FNAC as a diagnostic test for thyroid nodules demonstrated an accuracy of 81.3%, a sensitivity of 87.5%, a specificity 86.5% with a false positivity of 2.9%, false negativity of 4.3%, respectively. and Intra-operative frozen section demonstrated an accuracy of 86.8%, a sensitivity of 87.5%, a specificity 92.1%. In the benign lesion, there was no difference in accuracy between FNAC(95.6%) and frozen section(95.1%) but, in the suspicious malignant lesion, frozen section(46.2%) was superior to FNAC(32.0%), and in the malignant disease, FNAC(97.1%) was superior to frozen section(92.3%). Conclusion: Intraoperative frozen section biopsy is useful in patients undergoing surgery for a thyroid nodule with a 'suspicious' malignant lesion and could reduce inadequate extensive excision without missing malignancy and second operation and help to determine the resection margin. It adds no information in patients with a diagnosis of malignancy following FNAC assessment and is of limited use in those in whom a benign lesion is diagnosed.

• 대한한방내과학회지
• /
• 제29권3호
• /
• pp.827-834
• /
• 2008

Papillary thyroid carcinoma is the most common type of thyroid malignancy. It has better prognosis and rarer incidence of distant metastasis than other types of thyroid malignancy. However, once distant metastasis happens, its result will be bad. They mostly spread to the lungs and bones. and rarely to the brain. We report a patient with a papillary thyroid carcinoma metastasis to the lymph nodes. the ribs. the brain, and the lungs. The patient underwent total thyroidectomy, radioiodine ablation, rib partial resection, and lung wedge resection. However, upon progress of metastasis. the patient insisted on being treated with traditional Korean medical treatment using allergen-removed Rhus Verniciflua Stokes (A-RVS) instead of the conventional treatment including chemotherapy. The size of the tumor partly decreased, and the patient showed no side effects. This case report brings forth the importance of a thorough study in papillary thyroid carcinomas and their metastasis from the traditional Korean medical point of view, along with the long-term effect of allergen-removed Rhus Verniciflua Stokes (A-RVS).