- Retraction: Expression of RET in Thyroid Diseases of a Korean Population.
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Si Hoon Lee, Soon Won Hong, Woo Chul Moon, Myoung Ryur Oh, Jin Kyung Lee, Bong Soo Cha, Chul Woo Ahn, Kyung Rae Kim, Sung Kil Lim, Hyun Chul Lee
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J Korean Endocr Soc. 2008;23(1):70. Published online February 1, 2008
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- A Case of Silent Corticotroph-cell Adenoma with Elevated Serum ACTH.
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Jeong Geun Moon, So Young Park, Byoung Chul Cho, Jung Min Lee, Si Hoon Lee, Yoo Mee Kim, Yu Mie Rhee, Bong Soo Cha, Hyun Chul Lee, Sung Kil Lim
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J Korean Endocr Soc. 2004;19(5):535-541. Published online October 1, 2004
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- A 48 year-old man was referred to our Department with a headache, and also presented with an elevated serum ACTH level, but without an elevated serum cortisol. Although there was no clinical evidence of Cushing's syndrome, a brain CT and MRI showed a 4x4.5 cm sized pituitary mass, which was successfully removed by a transsphenoidal approach (TSA). A histopathological examination revealed the mass to have an ACTH positive reaction. Therefore, through hormonal and pathological evaluation, a silent corticotroph-cell adenoma (SCCA), with an elevated serum ACTH level, was diagnosed. Although reports on SCCA have been recently increased, this case is reported because these kinds of tumor are still rare, and those SCCA with an elevated serum ACTH even more so
- A Case of Follicular Thyroid Carcinoma Developed in Pendred Syndrome.
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So Hun Kim, Ji Young Jung, Sung Jae Shin, So Young Park, Si Hoon Lee, Yoo Mee Kim, Yu Mie Rhee, Soon Won Hong, Bong Soo Cha, Chul Woo Ahn, Kyung Rae Kim, Sung Kil Lim, Hyun Chul Lee
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J Korean Endocr Soc. 2004;19(4):411-418. Published online August 1, 2004
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- Pendred syndrome is an autosomal recessive genetic disorder, which is characterized by sensorineural hearing loss, goiter and a positive perchlorate discharge test. It is caused by mutations of the PDS gene, and its clinical characteristics vary widely. The thyroid function in most cases is normal, or shows only mild hypothyroidism. In Pendred syndrome, there is an organification defect that leads to defective thyroid hormone synthesis, followed by chronic TSH stimulation. Herein is reported a case of a follicular thyroid carcinoma associated with Pendred syndrome. To our knowledge, this is the first case reported in Korea. The patient presented with a huge anterior neck mass, sensorineural hearing loss and a positive perchlorate discharge test. Fine needle aspiration cytology suggested malignancy of the thyroid, and a total thyroidectomy, with central compartment node dissection, was performed. The pathology from the thyroid mass showed a poorly differentiated follicular thyroid carcinoma
- Expression of RET in Thyroid Diseases of a Korean Population.
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Si Hoon Lee, Soon Won Hong, Woo Chul Moon, Myoung Ryur Oh, Jin Kyung Lee, Bong Soo Cha, Chul Woo Ahn, Kyung Rae Kim, Sung Kil Lim, Hyun Chul Lee
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J Korean Endocr Soc. 2003;18(2):140-152. Published online April 1, 2003
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- BACKGROUND
Activation of the RET proto-oncogene, located on the long arms of chromosome 10, contributes to the development of thyroid cancers in two different ways. Somatic rearrangements of RET with variable genes of activation are frequently found in papillary thyroid carcinomas. And Ggerm-line point mutations are responsible for the development of medullary thyroid carcinoma and the multiple endocrine neoplasia type 2(MEN2). There are several conflicting reports on the influences of RET expression and RET/PTC rearrangements on the clinical outcome of thyroid cancer. Therefore, we performed an examination of RET expression and RET/PTC-1, -2, -3 rearrangements in papillary thyroid carcinomas and other thyroid diseases. METHODS: Twenty-six papillary thyroid carcinomas(PTCs), three follicular thyroid carcinomas (FTCs), one anaplastic thyroid carcinoma(ATC), five follicular adenomas(FAs), nineteen hyperplasias, and two normal thyroid tissues were included in this study. RT-PCR and immunohistochemistry analysis were done to identify RET gene, RET/PTC rearrangements, and ret RET protein expression. RESULTS: By RT-PCR, 89.4% of PTCs, 100% of FTCs, and 62.1% of hyperplasias expressed the RET gene, but no RET was observed in ATCs, FAs, and normal thyroid tissues. RET/PTC-1, -2,-3 rearrangements were not detected in any specimens. Immunohistochemical results revealed that 76.9% of PTCs, 50% of FAs, 52.3% of hyperplasias, and 20.6% of normal thyroid tissues expressed the RET ret protein, but FTCs and ATCs did not. Most PTCs showed strong cytoplasmic positivity in RET ret immunostaining, but the positive non- PTCs expressed weak and membranous staining. Overall, the two methods for detecting RET gene, RT-PCR and immunohistochemistry showed similar results. CONCLUSION: The RET gene was highly expressed in PTCs. In contrast to the previous reports of that theRET gene expression of RET gene is being limited to PTCs, RET was also expressed in hyperplasias, Fas, and normal thyroid tissues. However, the pattern and the degree of expression of the RET ret protein in non- PTCs were are different from those in PTCs.
- A Case of Bilateral Macronodular Adrenal Hyperplasia with Cushing's Syndrome Treated by Unilateral Adrenalectomy.
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Si Hoon Lee, Kwang Eun Lee, Eun Seok Kang, Sang Su Chung, Dae Jung Kim, Yun Mi Jin, Bong Soo Cha, Sung Kil Lim, Hyun Chul Lee, Kap Bum Huh
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J Korean Endocr Soc. 2002;17(4):596-602. Published online August 1, 2002
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- In order to differentiate the causes of Cushing's syndrome; whether it is pituitary or adrenal-dependent, a high dose dexamethasone suppression test is usually performed but this does not always correlated with the imaging diagnosis. We report a case of bilateral macronodular adrenal hyperplasia, which was thought to be independent to adrenocorticotrophin (ACTH) stimulation. At first we thought it was pituitary-dependent Cushing's syndrome, due to its suppression by high dose dexamethasone. However, we found no abnormal findings on the brain sella magnetic resonance image (MRI). A significant finding, however, we found bilateral adrenal masses on the abdominal computed tomography (CT). We performed percutaneous selective adrenal venous sampling (PSAVS), and confirmed hypercortisolism of the left adrenal mass only. Therefore, we decided to remove the left adrenal gland to preserve the residual function of the right adrenal gland. After the left adrenalectomy, the patient became normotensive, and their buffalo hump disappeared, and her 24 hour urinary free cortisol level returned to normal.
- A Case of Metastatic Pulmonary Calcification in Primary Hyperparathyroidism.
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Kwang Eun Lee, Hae Jin Kim, Si Hoon Lee, Sang Woon Bae, Eun Seok Kang, Hae Won Chung, Hye Sun Seo, Dae Jung Kim, Sang Soo Chung, Sun Jung Kim, Young Duk Song, Sung Kil Lim
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J Korean Endocr Soc. 2002;17(4):583-588. Published online August 1, 2002
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- Metastatic calcification is the deposition of calcium, in previously normal tissue, as a result of elevated plasma calcium and phosphorus product levels and has been reported in patients with parathyroid adenoma, parathyroid carcinoma, hyperparathyroidism due to chronic renal failure, vitamin D intoxication, and osteolytic bone tumors, such as multiple myelomas. The lungs are the most common site of metastatic calcification. We have experienced metastatic pulmonary calcification in a case of primary hyperparathyroidism. A 55-year old woman was admitted due to general weakness. From the laboratory evaluation, hypercalcemia and excess production of parathyroid hormone (PTH) were noted. technetium-99m-labelled sestamibi scintigraphy indicated an intense uptake in the lower pole area of the left thyroid gland, suggestive of a parathyroid adenoma. A technetium-99m phosphate (99mTc-MDP) bone scan showed increased uptakes in both lungs. A parathyroid lobectomy was performed, and primary hyperparathyroidism, due to a parathyroid adenoma, was finally diagnosed. A follow-up 99mTc-MDP bone scan showed the disappearance of the metastatic pulmonary calcification, with the clinical symptoms and biochemical parameters normalizing after 6 months.
- A Case of Insulinoma Combined with Pheochromocytoma.
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Si Hoon Lee, Young Hoon Youn, Sung Kil Lim, Bong Soo Cha, Hyun Chul Lee, Tae Woong Noh, Kap Bum Huh
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J Korean Endocr Soc. 2000;15(4-5):640-647. Published online January 1, 2001
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- Multiple endocrine neoplasia (MEN) is a combination of endocrine tumor associations and consists of 3 types: 1, 2A and 2B. Herein, we report a case of insulinoma which is combined with pheochromocytoma discovered at the left adrenal gland which was treated by surgical resection. We think there is a possibility of a new type of multiple endocrine neoplasia (MEN).
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