Journal of Pathology and Translational Medicine

Hyun Jung Kwon

5 Articles

Landscape of EGFR mutations in lung adenocarcinoma: a single institute experience with comparison of PANAMutyper testing and targeted next-generation sequencing: Jeonghyo Lee, Yeon Bi Han, Hyun Jung Kwon, Song Kook Lee, Hyojin Kim, Jin-Haeng Chung; J Pathol Transl Med. 2022;56(5):249-259. Published online September 13, 2022; DOI: https://doi.org/10.4132/jptm.2022.06.11

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Background
Activating mutations in the tyrosine kinase domain of epidermal growth factor receptor (EGFR) are predictive biomarkers for response to EGFR–tyrosine kinase inhibitor (TKI) therapy in lung adenocarcinoma (LUAD). Here, we characterized the clinicopathologic features associated with EGFR mutations via peptide nucleic acid clamping-assisted fluorescence melting curve analysis (PANAMutyper) and evaluated the feasibility of targeted deep sequencing for detecting the mutations.
Methods
We examined EGFR mutations in exons 18 through 21 for 2,088 LUADs from July 2017 to April 2020 using PANAMutyper. Of these, we performed targeted deep sequencing in 73 patients and evaluated EGFR-mutation status and TKI clinical response.
Results
EGFR mutation was identified in 55.7% of LUADs by PANAMutyper, with mutation rates higher in females (69.3%) and never smokers (67.1%) and highest in the age range of 50 to 59 years (64.9%). For the 73 patients evaluated using both methods, next-generation sequencing (NGS) identified EGFR mutation–positive results in 14 of 61 patients (23.0%) who were EGFR-negative according to PANAMutyper testing. Of the 10 patients reportedly harboring a sensitizing mutation according to NGS, seven received TKI treatment, with all showing partial response or stable disease. In the 12 PANAMutyper-positive cases, NGS identified two additional mutations in exon 18, whereas a discordant negative result was observed in two cases.
Conclusions
Although PANAMutyper identified high frequencies of EGFR mutations, targeted deep sequencing revealed additional uncommon EGFR mutations. These findings suggested that appropriate use of NGS may benefit LUAD patients with otherwise negative screening test results.

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Comparison of tissue-based and plasma-based testing for EGFR mutation in non–small cell lung cancer patients
Yoon Kyung Kang, Dong Hoon Shin, Joon Young Park, Chung Su Hwang, Hyun Jung Lee, Jung Hee Lee, Jee Yeon Kim, JooYoung Na
Journal of Pathology and Translational Medicine.2025; 59(1): 60. CrossRef
Localization of epidermal growth factor receptor-mutations using PNA:DNA probes in clinical specimens from patients with non-small cell lung cancer
Haruo Miyata, Hajime Shigeto, Tomoatsu Ikeya, Tadashi Ashizawa, Akira Iizuka, Yasufumi Kikuchi, Chie Maeda, Akari Kanematsu, Kazue Yamashita, Kenichi Urakami, Yuji Shimoda, Takeshi Nagashima, Keiichi Ohshima, Yasuhisa Ohde, Mitsuhiro Isaka, Takashi Sugino
Scientific Reports.2025;[Epub] CrossRef
Molecular characteristics and responses to EGFR tyrosine kinase inhibitors in non-small cell lung cancer patients with EGFR exon 19 insertions
Yang Li, Yunfeng Ni, Feng Lv, Yan Shi, Yedan Chen, Xiaoying Wu, Jiaohui Pang, Long Huang, Yang Shao, Tao Wang, Jie Min, Yang Song
BMC Medicine.2025;[Epub] CrossRef
Detection of EGFR exon 20 insertion mutations in non-small cell lung cancer: implications for consistent nomenclature in precision medicine
Jieun Park, Boram Lee, Ji-Young Song, Minjung Sung, Mi Jeong Kwon, Chae Rin Kim, Sangjin Lee, Young Kee Shin, Yoon-La Choi
Pathology.2024; 56(5): 653. CrossRef
Histo-pillar strip for optimal histogel block construction and biomarker analysis in 3D-lung cancer patient-derived organoids
Sang-Yun Lee, Eunyoung Lee, Ji-O Ryu, Kyuhwan Kim, Yongki Hwang, Bosung Ku, Seok Whan Moon, Mi Hyoung Moon, Kyung Soo Kim, Kwanyong Hyun, Jeong Uk Lim, Chan Kwon Park, Sung Won Kim, Chang Dong Yeo, Dong Woo Lee, Seung Joon Kim
Biofabrication.2024; 16(4): 045017. CrossRef

Clinicopathologic implication of PD-L1 gene alteration in primary adrenal diffuse large B cell lymphoma: Ki Rim Lee, Jiwon Koh, Yoon Kyung Jeon, Hyun Jung Kwon, Jeong-Ok Lee, Jin Ho Paik; J Pathol Transl Med. 2022;56(1):32-39. Published online November 16, 2021; DOI: https://doi.org/10.4132/jptm.2021.10.05

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Abstract PDF: Background
Primary adrenal (PA) diffuse large B cell lymphoma (DLBCL) was previously reported as an aggressive subset of DLBCL, but its genetic features were not sufficiently characterized. From our previous study of DLBCL with programmed death-ligand 1 (PD-L1) gene alterations, we focused on PD-L1 gene alterations in PA-DLBCL with clinicopathologic implications.
Methods
We performed fluorescence in situ hybridization for PD-L1 gene translocation and amplification in PA-DLBCL (n = 18) and comparatively analyzed clinicopathologic characteristics with systemic non-adrenal (NA)-DLBCL (n = 90).
Results
PA-DLBCL harbored distinctive features (vs. NADLBCL), including high international prognostic index score (3–5) (72% [13/18] vs. 38% [34/90], p = .007), poor Eastern Cooperative Oncology Group performance score (≥ 2) (47% [7/15] vs. 11% [10/90], p = .003), elevated serum lactate dehydrogenase (LDH) (78% [14/18] vs. 51% [44/87], p = .035) and MUM1 expression (87% [13/15] vs. 60% [54/90], p = .047). Moreover, PA-DLBCL showed frequent PD-L1 gene alterations (vs. NA-DLBCL) (39% [7/18] vs. 6% [5/86], p = .001), including translocation (22% [4/18] vs. 3% [3/87], p = .016) and amplification (17% [3/18] vs. 2% [2/87], p = .034). Within the PA-DLBCL group, PD-L1 gene–altered cases (vs. non-altered cases) tended to have B symptoms (p = .145) and elevated LDH (p = .119) but less frequent bulky disease (≥ 10 cm) (p = .119). In the survival analysis, PA-DLBCL had a poor prognosis for overall survival (OS) and progression-free survival (PFS) (vs. NA-DLBCL; p = .014 and p = .004). Within the PA-DLBCL group, PD-L1 translocation was associated with shorter OS and PFS (p < .001 and p = .012).
Conclusions
PA-DLBCL is a clinically aggressive and distinct subset of DLBCL with frequent PD-L1 gene alterations. PD-L1 gene translocation was associated with poor prognosis in PA-DLBCL.

Human Leukocyte Antigen Class I and Programmed Death-Ligand 1 Coexpression Is an Independent Poor Prognostic Factor in Adenocarcinoma of the Lung: Yeon Bi Han, Hyun Jung Kwon, Soo Young Park, Eun-Sun Kim, Hyojin Kim, Jin-Haeng Chung; J Pathol Transl Med. 2019;53(2):86-93. Published online January 14, 2019; DOI: https://doi.org/10.4132/jptm.2018.12.26

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Abstract PDF

Background
Both human leukocyte antigen (HLA) class I and programmed death-ligand 1 (PD-L1) molecules are known to play important roles in cancer immunity. In this study, we evaluated HLA class I expression in resected adenocarcinoma of the lung, and investigated its prognostic impact in correlation with PD-L1 expression.
Methods
HLA class I and PD-L1 expression was evaluated by immunohistochemistry in a total of 403 resected lung adenocarcinomas using tissue microarray. Correlations between the expression of HLA class I/PD-L1 and clinicopathologic features and prognostic significance were analyzed.
Results
HLA class I expression was reduced in 91.6% of adenocarcinoma, and more frequently reduced in patients with younger age, absence of vascular invasion, and low pathologic stage (p = .033, p = .007, and p = .012, respectively). Positive PD-L1 expression in tumor cells was 16.1% (1% cut-off), and associated with poor differentiation, presence of vascular invasion and nodal metastasis (p < .001, p = .002, and p = .032, respectively). On survival analysis, HLA class I or PD-L1 expression alone did not show any statistical significance. On the integrated analysis, HLA class I (+)/PD-L1 (+) subgroup showed a significantly shorter overall survival than other groups (p = .001). Multivariate analysis revealed that coexpression of HLA class I and PD-L1 was an independent poor prognostic factor of lung adenocarcinoma. (p < .001; hazard ratio, 6.106; 95% confidence interval, 2.260 to 16.501).
Conclusions
Lung adenocarcinoma with coexpression of HLA class I and PD-L1 was associated with poor prognosis. This subgroup may evade immune attack by expressing PD-L1 protein despite HLA expression.

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Assessment of cancer cell‐expressed HLA class I molecules and their immunopathological implications
Terufumi Kubo, Shiori Asano, Kenta Sasaki, Kenji Murata, Takayuki Kanaseki, Tomohide Tsukahara, Yoshihiko Hirohashi, Toshihiko Torigoe
HLA.2024;[Epub] CrossRef
Prognostic and Clinical Significance of Human Leukocyte Antigen Class I Expression in Breast Cancer: A Meta-Analysis
Weiqiang Qiao, Zhiqiang Jia, Wanying Guo, Qipeng Liu, Xiao Guo, Miao Deng
Molecular Diagnosis & Therapy.2023; 27(5): 573. CrossRef
Loss of HLA-class-I expression in non-small-cell lung cancer: Association with prognosis and anaerobic metabolism
Ioannis M. Koukourakis, Alexandra Giatromanolaki, Achilleas Mitrakas, Michael I. Koukourakis
Cellular Immunology.2022; 373: 104495. CrossRef

Combined Hepatocellular Carcinoma and Neuroendocrine Carcinoma with Ectopic Secretion of Parathyroid Hormone: A Case Report and Review of the Literature: Hyun Jung Kwon, Ji-Won Kim, Haeryoung Kim, YoungRok Choi, Soomin Ahn; J Pathol Transl Med. 2018;52(4):232-237. Published online May 25, 2018; DOI: https://doi.org/10.4132/jptm.2018.05.17

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Abstract PDF

Primary combined hepatocellular carcinoma (HCC) and neuroendocrine carcinoma is a rare entity, and so is hypercalcemia due to ectopic parathyroid hormone (PTH) secretion by tumor. A 44-year old man with hepatitis B virus associated chronic liver disease presented with a hepatic mass. Hemihepatectomy discovered the mass as combined HCC and poorly differentiated cholangiocarcinoma. During adjuvant chemoradiation therapy, he presented with nausea, and multiple systemic metastases were found. Laboratory tests revealed hypercalcemia with markedly elevated PTH and neuron specific enolase. Parathyroid scan showed normal uptake in parathyroid glands, suggestive of ectopic PTH secretion. Subsequently, immunohistochemistry of neuroendocrine marker was performed on the primary lesion, and confirmed the neuroendocrine differentiation in non-HCC component. The patient died 71 days after surgery. This report may suggest the possibility of ectopic PTH secretion by neuroendocrine carcinoma of hepatic origin causing hypercalcemia. Caution for neuroendocrine differentiation should be exercised when diagnosing poorly differentiated HCC.

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Comparison of Metastatic Patterns Among Neuroendocrine Tumors, Neuroendocrine Carcinomas, and Nonneuroendocrine Carcinomas of Various Primary Organs
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Immunohistochemical characterization of a steroid-secreting oncocytic adrenal carcinoma responsible for paraneoplastic hyperparathyroidism
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Contrast-Enhanced Ultrasound Findings of Hepatocellular Carcinoma With Neuroendocrine Carcinoma: A Case Report
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Hepatocellular carcinoma in patients with renal dysfunction: Pathophysiology, prognosis, and treatment challenges
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Severe hypercalcaemia from ectopic intact parathyroid hormone secretion treated with continuous renal replacement therapy in a patient with two malignancies
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Current Problems in Cancer: Case Reports.2020; 1: 100020. CrossRef

Osteosarcomatous Differentiation in Rebiopsy Specimens of Pulmonary Adenocarcinoma with EGFR-TKI Resistance: Hyein Ahn, Hyun Jung Kwon, Eunhyang Park, Hyojin Kim, Jin-Haeng Chung; J Pathol Transl Med. 2018;52(2):130-132. Published online April 4, 2017; DOI: https://doi.org/10.4132/jptm.2016.11.17

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