• Journal of the Korean Society of Radiology
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• v.84 no.3
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• pp.596-605
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• 2023

Purpose This study aimed to evaluate the US features of the parathyroid glands (PTGs) using surgical specimens of normal PTGs obtained during thyroid surgery. Materials and Methods This study included 34 normal PTGs from 17 consecutive patients who underwent thyroid surgery between December 2020 and March 2021. All normal PTGs were histologically confirmed by intraoperative frozen-section biopsy for autotransplantation. Surgically resected parathyroid specimens were scanned in sterile normal saline using high-resolution US prior to autotransplantation. The US features of echogenicity (hyperechogenicity or hypoechogenicity), echotexture (homogeneous or heterogeneous), size, and shape (ovoid or round) were retrospectively evaluated. The echogenicity of the three PTGs was compared with that of the thyroid parenchyma of the resected thyroid specimens in two patients. Results All PTGs showed hyperechogenicity similar to that of gauze soaked in normal saline. Homogeneous hyperechogenicity was observed in 32/34 (94.1%) patients, and the echogenicity of the three PTGs was hyperechoic compared with that of the thyroid parenchyma. The long diameter of the PTGs ranged from 5.1 mm to 9.8 mm (mean, 7.1 mm) and the shape of the PTGs was ovoid in 33/34 (97.1%) patients. Conclusion The echogenicity of normal PTG specimens was consistently hyperechoic, and the small ovoid homogeneously hyperechoic structure was a characteristic US feature of the PTGs.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2021.11a
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• pp.228-228
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• 2021

해운산업은 기간산업으로 우리나라의 경제에 미치는 영향이 상당함에도 불구하고 국제항해상선을 운용하는데 필수요소인 해기사 수급의 어려움을 겪고 있으며 많은 사회·경제적인 부담이 되고 있는 실정이다. 따라서 본 연구는 국제항해상선 해기사를 내외국인으로 구분하고 통계모형을 활용하여 해기사 수요와 공급을 예측하고자 한다. 이를 통하여 식별된 수급간 불균형의 문제에 대한 해결방안을 모색하는데 기초자료로 활용하고자 한다.

• Journal of the Korean Society of Radiology
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• v.85 no.2
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• pp.327-344
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• 2024

Parathyroid glands are small endocrine glands that regulate calcium metabolism by producing parathyroid hormone (PTH). These are located at the back of the thyroid gland. Typically, four glands comprise the parathyroid glands, although their numbers may vary among individuals. Parathyroid diseases are related to parathyroid gland dysfunction and can be caused by problems with the parathyroid gland itself or abnormal serum calcium levels arising from renal disease. In recent years, as comprehensive health checkups have become more common, abnormal serum calcium levels are often found incidentally in blood tests, after which several additional tests, including a PTH test, ultrasonography (US), technetium-99m sestamibi parathyroid scan, single-photon-emission CT (SPECT)/CT, four-dimensional CT (4D-CT), and PET/CT, are performed for further evaluation. However, the parathyroid gland remains an organ less familiar to radiologists. Therefore, the normal anatomy, pathophysiology, imaging, and clinical findings of the parathyroid gland and its associated diseases are discussed here.

• The Journal of the Korean bone and joint tumor society
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• v.13 no.2
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• pp.173-179
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• 2007

Brown tumor is tumor like lesion resulted from hyperparathyroidism, and it has been rarely reported recently. We evaluated a 29-year-old woman who had brown tumor on proximal humerus caused by primary hyperparathyroidism. She first had presented pain and swelling over the upper arm, and was suspected as giant cell tumor in biopsy combined with hyperparathyroidism. Wide marginal excision and tumor prosthesis were performed. However, it was confirmed as brown tumor resulted from parathyroid adenoma according to laboratory findings and radioactive isotopes image, and surgical excision of adenoma relieved clinical symptoms. We report this case with a review of literatures.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2007.12a
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• pp.313-315
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• 2007

해영상선의 LNG Training과정을 소개하고 과정별 주요내용 및 교육장비를 소개함

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2007.12a
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• pp.109-111
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• 2007

외국인선원 고용 확대의 주된 요인으로 주장되고 있는 선원의 부족문제, 그 중에서도 국적외항상선에 대한 우리나라 해기사의 수급현황을 객관적인 자료에 기초하여 분석함으로써 외국인해기사의 고용범위 조정에 대한 합리적인 근거를 제시하였다.

• Proceedings of KOSOMES biannual meeting
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• 2017.11a
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• pp.111-111
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• 2017

• Journal of Chest Surgery
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• v.36 no.1
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• pp.59-62
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• 2003

Mediastinal parathyroid cyst is a very rare disease and is usually found incidentally. Surgical excision is the treatment of choice and recurrence is very rare when complete excision is done. A 71-year-old man was referred to our department because of 6$\times$5cm sized right superior mediastinal mass found incidentally on chest X-ray Surgical excision was performed and pathologic findings were confirmed as mediastinal parathyroid cyst. The patient has been followed up postoperatively without recurrence for 4 months up to now. We report a case of mediastinal parathyroid cyst.

• The Korean Journal of Nuclear Medicine
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• v.33 no.2
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• pp.120-130
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• 1999

Purpose: This study was performed to evaluate the diagnostic usefulness of double-phase Tc-99m MIBI parathyroid scintigraphy with single photon emission computed tomography (SPECT) in patients with hyper-parathyroidism. We also evaluated the relationship between Tc-99m MIBI uptake and oxyphil cell contents in parathyroid glands. Materials and Methods: The subjects were 28 parathyroid glands of 10 patients who underwent Tc-99m MIBI parathyroid scintigraphy and parathyroidectomy for clinically suspected hyper-parathyroidism. Early and delayed pinhole images were obtained at 15 minutes and 2 hours after injection of Tc-99m MIBI, and SPECT images were followed. The weight and oxyphil cell contents of parathyroid tissue were obtained from pathologic specimen, and the scintigraphic findings were compared with histopathology. Results: In surgical histopathology, 6 parathyroid adenomas and 9 parathyroid hyperplasias were confirmed. The sensitivity, specificity, and positive predictive value of early and delayed images were 46.7% (7/15), 76.9% (10/13), 70% (7/10) and 66.7% (10/15), 92.3% (12/13), 90.9% (10/11), respectively. SPECT image detected an additional small hyperplasia.. The sensitivity, specificity, and positive predictive value of combined interpretation of early and delayed images with SPECT were 73.3% (11/15), 100% (13/13), 100% (11/11). The sensitivity was 100% (6/6) for adenoma, whereas that was 55.5% (5/9) for hyperplasia. Both adenomas and hyperplasias showed significantly increased oxyphil cell contents compared with normal parathyroid glands (p<0.0001), but the oxyphil cell content and weight were not significantly different between adenomas and hyperplasias. Conclusion: Double-phase Tc-99m MIBI parathyroid scintigraphy with SPECT is useful for lesion localization in patients with hyperparathyroidism. Although both adenoma and hyperplasia have increased oxyphil cell content, the sensitivity is high in adenoma, but low in hyperplasia.

• Proceedings of the KOR-BRONCHOESO Conference
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• 1987.05a
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• pp.24.3-24
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• 1987

설갑상선은 주로 설맹공과 후두개사이에서 발생하는 일종의 이소성 갑상선으로서, 비교적 희귀한 질환으로, 1869년 Hickman이 처음으로 보고한 이래, 외국에서는 약 300례 정도의 보고가 있다. 최근 저자들은 48세 남자에서 정상 위치에 있어야 할 갑상선이 결여되고, 설갑상선 만이 있는 1례를 우연히 발견해서, 갑상선 scan 으로 확인할 수 있었기에 문헌적 고찰과 함께 보고하는 바이다.