Position:            Head of Division of Endocrine Surgery

                           Professor

Affiliation:        Division of Endocrine Surgery, Department of Surgery,

Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea

Address:            Department of Surgery, Asan Medical Center 88, Olympic-Ro 43-Gil, Songpa-Gu, Seoul, 05505, Korea

Contact:            Tel. 82-2-3010-5862

                           E-mail. [email protected]

License:            Korean National Medical License, No. 76132 (April 4, 2002)

                           Korean Board of Surgery License, No. 6125 (March 3, 2008)

Professional Experience:

Professor                    2024 – Present   Head of Division of Endocrine Surgery,

Department of Surgery, Asan Medical Center,

University of Ulsan College of Medicine, Korea

Associate Professor     2018 – 2023       Division of Endocrine Surgery,

Department of Surgery, Asan Medical Center,

University of Ulsan College of Medicine, Korea

Long-term Overseas Visiting Scholar

2019 – 2020       Department of Surgery and Stanford Cancer Institute, Stanford University School of Medicine, Stanford, California, USA

Clinical Assistant Professor

                                        2013 – 2017       Division of Endocrine Surgery,

Department of Surgery, Asan Medical Center,

University of Ulsan College of Medicine, Korea

Clinical Instructor       2010 – 2013     Division of Endocrine Surgery,

Department of Surgery, Asan Medical Center,

University of Ulsan College of Medicine, Korea

Training:

Fellowship                 2008 – 2009     Department of Surgery, Severance Hospital,

Yonsei University College of Medicine, Korea

                                         2009 – 2010     Department of Surgery, Asan Medical Center,

Oversea Training        2008.10            Department of Surgery, College of Physicians and

                                                                   Surgeons of Columbia University, New York, USA

Residency                   2003 – 2007     Department of Surgery, Severance Hospital,

Yonsei University College of Medicine, Korea

University of Ulsan College of Medicine, Korea

Education:       

Doctor of Philosophy               2012     Yonsei University Graduate School, Korea

Master of Medicine                  2006     Yonsei University Graduate School, Korea

Bachelor of Medicine              2002     Yonsei University Wonju College of Medicine,

                                                               Korea

Professional Society Membership:

Korean Association of Endocrine Surgeons

Korean Thyroid Association

Korean Surgical Society

American Thyroid Association

American Association of Endocrine Surgeons

International Association of Endocrine Surgeons

Asian Association of Endocrine Surgeons

Asia and Oceania Thyroid Association

Korean Association of Robotic Surgeons

Korean Society of Endoscopic & Laparoscopic Surgeons

Korean Society for Head and Neck Oncology

Korean Medical Association

First or Corresponding Authorship Publications

1. Kim BC, Han H, Kwon D, Pak SJ, An HR, Kim WW, Lee YM, Lee SH, Koh JM, Lee JL, Chung KW, Song DE, Sung TY.  Limitation of the current Lin-Weiss-Bisceglia criteria in predicting poor prognosis in oncocytic adrenocortical neoplasms of uncertain malignant potential and oncocytoma diagnosed by the Lin-Weiss-Bisceglia criteria. Ther Adv Endocrinol Metab. 2025 Apr 30;16:20420188251328186.
2. Cho JW, Rah CS, Kim WW, Lee YM, Kim SC, Baek JH, Song DE, Kim WG, Chung KW, Hong SJ, Sung TY. Concurrent Association of Multifocality, Bilaterality, and Recurrence in Pediatric Papillary Thyroid Cancer Patients. Yonsei Med J. 2025 Jan;66(1):43-50.
3. Kwon D, Rah CS, Kim BC, Pak SJ, Cho JW, Kim WW, Lee YM, Lee JL, Song DE, Chung KW, Sung TY. Early stage adrenocortical carcinoma-what contributes to poor prognosis after adrenalectomy? A retrospective cohort study. Ann Surg Treat Res. 2024 Oct;107(4):187-194.
4. Jung J, Kim BC, Kwon D, Kim WW, Lee YM, Park KJ, Lee SH, Chung KW, Sung TY. Predictors of malignancy for treatment direction in patients with nonfunctioning adrenal incidentaloma. Surg Oncol. 2024 Oct;56:102122.
5. Kim BC, Pak SJ, Kwon D, Cho JW, Kim WW, Lee YM, Park KJ, Chung KW, Sung TY.
   Silent pheochromocytoma in adrenal incidentaloma: unveiling clinical and radiological characteristics. Ann Surg Treat Res. 2024 Jan;106(1):38-44. 
6. Kim BC, Yoon HK, Park KJ, Kim GH, Pak SJ, Kwon D, Cho JW, Kim WW, Lee YM, Koh JM, Lee SH, Chung KW, Sung TY. Diagnostic consistency between computed tomography and adrenal vein sampling of primary aldosteronism: Leading to successful curative outcome after adrenalectomy: A retrospective study. Int J Surg. 2024 Feb 1;110(2):839-846.
7. Rah CS, Cho JW, Kim WW, Lee YM, Chung KW, Koh JM, Lee SH, Lee JL, Song DE, Hong SJ, Sung TY. Change of treatment modality and outcomes of adrenocortical carcinoma: a retrospective review of single tertiary center experience over 24 years. Gland Surg. 2022 Oct;11(10):1615-1627.
8. Kim WW, Kim DH, Cho JW, Rah CS, Lee YM, Chung KW, Koh JM, Lee SH, Hong SJ, Kim YJ, Sung TY.
   The association between the type of anesthesia and hemodynamic instability during pheochromocytoma surgery: a retrospective cohort study. Surg Endosc. 2022 Jul;36(7):5491-5500.
9. Sung TY, Tennakoon L, Alobuia WM, Seib C, Cisco R, Lin D, Kebebew E. Factors associated with postoperative complications and costs for adrenalectomy in benign adrenal disorders. Surgery. 2022 Jun;171(6):1519-1525.
10. Lee YM, Jeon MJ, Kim WW, Chung KW, Baek JH, Shong YK, Sung TY, Hong SJ. Comparison Between Familial and Sporadic Non-medullary Thyroid Carcinoma: A Retrospective Individual Risk Factor-Matched Cohort Study. Ann Surg Oncol. 2021 Mar;28(3):1722-1730.
11. Sung TY, Alobuia WM, Tyagi MV, Ghosh C, Kebebew E. Adrenal Vein Sampling to Distinguish Between Unilateral and Bilateral Primary Hyperaldosteronism: To ACTH Stimulate or Not? J Clin Med. 2020 May 13;9(5):E1447. 
12. Rah CS, Kim WW, Lee YM5, Kim WG, Song DE, Chung KW, Kim SC, Hong SJ, Sung TY. Recent Trends in the Clinicopathological Features of Thyroid Nodules in Pediatric Patients: A Single Tertiary Center Experience over 25 Years. Int J Endocrinol. 2019 Dec 20;2019:1829043. doi: 10.1155/2019/1829043. eCollection 2019.
13. Kim WW, Lee YM, Chung KW, Hong SJ, Sung TY. Comparison of Robotic Posterior Retroperitoneal Adrenalectomy over Laparoscopic Posterior Retroperitoneal Adrenalectomy: A Single Tertiary Center Experience. Int J Endocrinol. 2019 Dec 1;2019:9012910. doi: 10.1155/2019/9012910. eCollection 2019.
14. Hong D, Lee S, Kim T, Baek JH, Kim WW, Chung KW, Kim N, Sung TY. Usefulness of a 3D-Printed Thyroid Cancer Phantom for Clinician to Patient Communication. World J Surg. 2020 Mar;44(3):788-794.
15. Kim WW, Lee YM, Chung KW, Hong SJ, Sung TY. Safety and feasibility of reduced-port site surgery for robotic posterior retroperitoneal adrenalectomy. Surg Endosc. 2019 Nov 18. doi: 10.1007/s00464-019-07273-0. Online ahead of print.
16. Hong D, Lee S, Kim T, Baek JH, Lee YM, Chung KW, Sung TY, Kim N. Development of a personalized and realistic educational thyroid cancer phantom based on CT images: An evaluation of accuracy between three different 3D printers. Comput Biol Med. 2019 Oct;113:103393. 
17. Cho JW, Kim WW, Lee YM, Jeon MJ, Kim WG, Song DE, Park Y, Chung KW, Hong SJ, Sung TY. Impact of tumor-associated macrophages and BRAF_V600E mutation on clinical outcomes in patients with various thyroid cancers. Head Neck. 2019 Mar;41(3):686-691.
18. Song E, Han M, Oh HS, Kim WW, Jeon MJ, Lee YM, Kim TY, Chung KW, Kim WB, Shong YK, Hong SJ, Sung TY, Kim WG. Lobectomy Is Feasible for 1-4 cm Papillary Thyroid Carcinomas: A 10-Year Propensity Score Matched-Pair Analysis on Recurrence. Thyroid. 2019 Jan;29(1):64-70.
19. Song E, Lee YM, Oh HS, Jeon MJ, Song DE, Kim TY, Kim WB, Shong YK, Sung TY, Kim WG. A Relook at the T Stage of Differentiated Thyroid Carcinoma with a Focus on Gross Extrathyroidal Extension. Thyroid. 2019 Feb;29(2):202-208.
20. Cho JW, Lee YM, Sung TY, Yoon JH, Chung KW, Hong SJ. Factors related to improved clinical outcomes associated with adrenalectomy for metachronous adrenal metastases from solid primary carcinomas. Surg Oncol. 2018 Mar;27(1):18-22.
21. Sung TY, Cho JW, Lee YM, Lee YH, Kwon H, Jeon MJ, Kim WG, Choi YJ, Song DE, Chung KW, Yoon JH, Hong SJ. Dynamic Risk Stratification in Stage I Papillary Thyroid Cancer Patients Younger Than 45 Years of Age. Thyroid. 2017 Nov;27(11):1400-1407.
22. Sung TY, Choi YM, Kim WG, Lee YM, Kim TY, Shong YK, Kim WB, Song DE. Myxoid and Sarcomatoid Variants of Adrenocortical Carcinoma: Analysis of Rare Variants in Single Tertiary Care Center. J Korean Med Sci. 2017 May;32(5):764-771.
23. Park S, Jeon MJ, Song E, Oh HS, Kim M, Kwon H, Kim TY, Hong SJ, Shong YK, Kim WB, Sung TY, Kim WG. Clinical Features of Early and Late Postoperative Hypothyroidism After Lobectomy. J Clin Endocrinol Metab. 2017 Apr 1;102(4):1317-1324.
24. Sung TY, Jeon MJ, Lee YH, Lee YM, Kwon H, Yoon JH, Chung KW, Kim WG, Song DE, Hong SJ. Initial and Dynamic Risk Stratification of Pediatric Patients With Differentiated Thyroid Cancer. J Clin Endocrinol Metab. 2017 Mar 1;102(3):793-800.
25. Sung TY, Yoon JH, Han M, Lee YH, Lee YM, Song DE, Chung KW, Kim WB, Shong YK, Hong SJ. Oncologic Safety of Robot Thyroid Surgery for Papillary Thyroid Carcinoma: A Comparative Study of Robot versus Open Thyroid Surgery Using Inverse Probability of Treatment Weighting. PLoS One. 2016 Jun 10;11(6):e0157345.
26. Sung TY, Yoon JH, Song DE, Lee YM, Kim TY, Chung KW, Kim WB, Shong YK, Hong SJ. Prognostic Value of the Number of Retrieved Lymph Nodes in Pathological Nx or N0 Classical Papillary Thyroid Carcinoma. World J Surg. 2016 Aug;40(8):2043-50.
27. Kwon H, Kim WG, Sung TY, Jeon MJ, Song DE, Lee YM, Yoon JH, Chung KW, Hong SJ, Baek JH, Lee JH, Kim TY, Shong YK, Kim WB. Changing trends in the clinicopathological features and clinical outcomes of medullary thyroid carcinoma. J Surg Oncol. 2016 Feb;113(2):152-8.
28. Sung TY, Lee YM, Yoon JH, Chung KW, Hong SJ. Importance of the intraoperative appearance of preserved parathyroid glands after total thyroidectomy. Surg Today. 2016 Mar;46(3):356-62.
29. Choi YM, Sung TY, Kim WG, Lee JJ, Ryu JS, Kim TY, Kim WB, Hong SJ, Song DE, Shong YK. Clinical course and prognostic factors in patients with malignant pheochromocytoma and paraganglioma: A single institution experience. J Surg Oncol. 2015 Oct 14. doi: 10.1002/jso.24063. [Epub ahead of print]
30. Sung TY, Kim M, Kim TY, Kim WG, Park Y, Song DE, Park SY, Kwon H, Choi YM, Jang EK, Jeon MJ, Shong YK, Hong SJ, Kim WB. Negative Expression of CPSF2 Predicts a Poorer Clinical Outcome in Patients with Papillary Thyroid Carcinoma. Thyroid. 2015 Sep;25(9):1020-5.
31. Sung TY, Lee YM, Yoon JH, Chung KW, Hong SJ. Long-Term Effect of Surgery in Graves' Disease: 20 Years Experience in a Single Institution. Int J Endocrinol. 2015;2015:542641.
32. Sung TY, Lee YM, Yoon JH, Chung KW, Hong SJ. Surgical Management of Familial Papillary Thyroid Microcarcinoma: A Single Institution Study of 94 Cases. World J Surg. 2015 Aug;39(8):1930-5.
33. Sung T, Lee Y, Yoon JH, Chung K, Hong SJ. The Best Surgical Tips for Parathyroid Preservation in Thyroid Surgery. VideoEndocrinology. August 2015, 2.
34. Sung T, Lee Y, Yoon JH, Chung K, Hong SJ. Advance in Transverse Cervical Scar After Conventional Thyroid Surgery. VideoEndocrinology. May 2015, 2.
35. Sung TY, Choi SH, Lee JM, Jeong JJ, Kang SW, Chung WY. Innovative in vitro chemo-hormonal drug therapy for refractory thyroid carcinomas. J Korean Med Sci. 2012 Jul;27(7):729-35.
36. Sung TY, Lee SR, Lee JH, Lee YM, Lee AL, Hwang DW, Yoon JH, Gong G, Hong SJ, Park KM. Hepatocellular carcinoma eats medullary thyroid carcinoma, a case of tumor-in-tumor metastasis. Endocrine Journal. 2011;58(9):801-5.
37. Sung TY, Shin YW, Nam KH, Chang HS, Rhee Y, Park CS, Chung WY. Psychological Impact of Thyroid Surgery on Patients with Well-differentiated Papillary Thyroid Cancer. Quallity of Life Research. 2011;20(9):1411-7.
38. Sung TY, Yoon JH, Hong SJ. Recurred Parathyroid Carcinoma: A Case of Cervical Recurrence Presenting Discrepancy between Image Findings and Operative Findings. Korean Journal of Endocrine Surgery. 2011;11(1):35-37.
39. Sung TY, Kim YS, Lee SH, Yoon JH, Hong SJ. Surgical Treatment of Graves' Disease: Comparison between Total Thyroidectomy and Subtotal Thyroidectomy. Journal of Korean Surgical Society. 2009;77(2):82-87.
40. Sung TY, Hong SW, Kang SW, Lee SC, Jeong JJ, Lee YS, Nam KH, Chang HS, Chung WY, Park CS. Anaplastic Transformation of Metastatic Papillary Thyroid Carcinomas in the Cervical Lymph Nodes: Report of 3 Cases. Korean Journal of Endocrine Surgery. 2008;8(3):210-213.
41. Sung TY, Yun JS, Jeong JJ, Lee YS, Nam KH, Cung WY, Chang HS, Park CS. Is the Supraspinal Accessory Lymph Node Dissection Always Necessary in Thyroid Carcinoma Patients with Lateral Neck Node Metastasis? Korean Journal of Endocrine Surgery. 2007;7(2):88-93.
42. Sung TY, Kim YS, Ahn HJ, Lee YH, Ju MK, Hyung WJ. Gastric Perforation Associated with Vascular Invasive Mucormycosis in a Renal Transplant Recipient. Journal of Korean Surgical Society. 2006;71(5):376-378.
43. Sung TY, Nam KH, Yoon JH, Chang HS, Park CS. The Optimal Timing for Surgery in Well-differentiated Thyroid Carcinoma Detected during Pregnancy. Journal of Korean Surgical Society. 2005;68(2):102-106.