Endocrinology and Metabolism

Youn Sun Bai (Bai YS)

3 Articles

A Case of Multiple Endocrine Neoplasia Type I with Atypical Clinical Course.: Yun Sun Choi, Youn Sun Bai, Bon Jeong Ku, Young Suk Jo, Young Kun Kim, Heung Kyu Ro, Minho Shong; J Korean Endocr Soc. 2008;23(4):266-271. Published online August 1, 2008; DOI: https://doi.org/10.3803/jkes.2008.23.4.266

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Multiple endocrine neoplasia type 1 (MEN 1) is characterized by the combined occurrence of primary hyperparathyroidism, enteropancreatic tumors and anterior pituitary adenoma. Yet carcinoid tumors, adrenal adenoma and lipoma might exist simultaneously. Thymic carcinoid tumors, which are recognized as one of the causes of death for patients with MEN 1, are uncommon and their natural history has barely been investigated.

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A rare case of multiple endocrine neoplasia type 1 initially presenting as an asymptomatic, huge mediastinal mass: case report
Ji Eun Jun, You-Cheol Hwang, Kyu Jeong Ahn, Ho Yeon Chung, In-Kyung Jeong
BMC Endocrine Disorders.2021;[Epub] CrossRef
A Case of Asymptomatic Multiple Endocrine Neoplasia Type I with Thymic Carcinoid
Suk Ki Park, Moon Won Lee, In Sub Han, Young Joo Park, Sung Yong Han, Joon Woo Park, Bong Eun Lee, Gwang Ha Kim, Sang Soo Kim
The Korean Journal of Helicobacter and Upper Gastrointestinal Research.2019; 19(1): 65. CrossRef
Incidental metastatic mediastinal atypical carcinoid in a patient with parathyroid adenoma: a case report
Zareen Kiran, Asma Ahmed, Owais Rashid, Saira Fatima, Faizan Malik, Saulat Fatimi, Mubassher Ikram
Journal of Medical Case Reports.2017;[Epub] CrossRef
Multiple Endocrine Neoplasia Type 1 Presenting with an Invasive Giant Prolactinoma
Jinhoon Cha, Jin Seo Kim, Jung Suk Han, Yeon Won Park, Min Joo Kim, Yun Hyi Ku, Hong Il Kim
The Korean Journal of Medicine.2016; 91(3): 300. CrossRef
Genetic and Epigenetic Analysis in Korean Patients with Multiple Endocrine Neoplasia Type 1
Yoon Jung Chung, Sena Hwang, Jong Ju Jeong, Sun Yong Song, Se Hoon Kim, Yumie Rhee
Endocrinology and Metabolism.2014; 29(3): 270. CrossRef
A Case of Asymptomatic Multiple Endocrine Neoplasia Type 1 Detected Incidentally on Health Screening
Pyung-San Cho, Hoon Park, Guk-Haeng Lee, Myung-Chul Lee
Korean Journal of Otorhinolaryngology-Head and Neck Surgery.2012; 55(6): 373. CrossRef

Two Cases of Simple Virilizing Congenital Adrenal Hyperplasia with Compound Heterozygous Mutations of CYP21 Gene.: Koon Soon Kim, Yun Sun Choi, Youn Sun Bai, So Young Rha, Young Suk Jo, Minho Shong; J Korean Endocr Soc. 2007;22(4):299-304. Published online August 1, 2007; DOI: https://doi.org/10.3803/jkes.2007.22.4.299

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Abstract PDF: Steroid 21-hydroxylase deficiency is the most frequent cause of congenital adrenal hyperplasia (CAH), which is an inherited inability to synthesize cortisol. Actually, CAH is caused by mutations in the CYP21 gene encoding the steroid 21-hydroxylase enzyme. In some cases, discordance has been observed between the genotype and the phenotype. We recently experienced two cases of simple virilizing congenital adrenal hyperplasia with compound heterozygous mutations of the CYP21 gene. The patients had primary amenorrhea and showed virilization. We have described these two cases along with a review of the literature.

The Relationship between the Expression of MHC Class II Antigens and the Clinical Prognosis of Papillary Thyroid Carcinoma Patients.: Jun Chul Lee, Seul Young Kim, Yun Sun Choi, Youn Sun Bai, Yun Jeung Kim, Ihn Suk Lee, Ki Hyun Kwon, So Young Rha, Bon Jeong Ku, Young Kun Kim, Heung Kyu Ro, Shengjin Li, Jin Man Kim, Young Suk Jo, Minho Shong; J Korean Endocr Soc. 2007;22(1):26-34. Published online February 1, 2007; DOI: https://doi.org/10.3803/jkes.2007.22.1.26

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Abstract PDF: BACKGROUND
Papillary thyroid carcinoma is among the most curable cancers, but some patients are at high risk for recurrence or even death. MHC antigens are essential molecules for the pathogenesis of carcinoma and also the physiologic immune responses against tumor. However, there is no data about the relationship between the expression of MHC antigens and the clinical prognosis of papillary thyroid carcinoma patients. METHODS: We analyzed the relationship between the various prognostic factors and the MHC antigen expression by conducting a retrospective study of 215 patients, who had undergone thyroidectomy for papillary thyroid carcinoma between 1987 and 2003. RESULTS: The expressions of MHC class II antigens were more frequent in papillary thyroid carcinoma than in the other thyroid diseases. Yet there was no statistically significant relationship between most of the clinicopathological factors and the expression of MHC class II antigens in papillary thyroid carcinoma patients. Interestingly, an HLA-DR expression was found in 8 (30.8%) of the 26 patients in the recurrence group and in 13 (76.5%) of the 17 patients in the non-recurrence group, and HLA-DP/DQ immunoreactivity was positive in 10 (38.5%) cases of the recurrence group and in 14 (82.4%) cases of the non-recurrence group. CONCLUSION: Papillary thyroid carcinoma showed a more frequent expression of MHC Class II antigens. However, the recurred papillary thyroid carcinoma showed a tendency to downregulate the expression of MHC class II antigens. Hence, the molecular mechanism for the expression of MHC class II antigens might have a role in the recurrence of papillary thyroid carcinoma.

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