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Gastroenterology / Review
Epidemiological and clinical trends of malignant small-bowel tumors in Asia
Jung Rock Moon, Seong Ran Jeon
Korean J Intern Med. 2026;41(5):799-807. Published online August 26, 2026
Malignant small-bowel tumors are uncommon, accounting for < 5% of all gastrointestinal cancers, yet their incidence has exhibited a steady rise in both Western and Asian populations. This increase is attributed to expanded use of advanced diagnostic modalities and improved registry completeness. Mali..
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Rheumatology / Original Article
Tumor necrosis factor inhibitor prescribing and persistence by specialty in radiographic axial spondyloarthritis: a Korean claims study
Bon San Koo, Ye-Jee Kim, Yeo-Jin Lee, Yong-Gil Kim, Tae-Hwan Kim
Korean J Intern Med. 2026;41(4):766-778. Published online July 1, 2026
Background/Aims: Although several studies have shown that specialist care may be associated with better outcomes, methodological limitations have made it difficult to draw definitive conclusions. Therefore, we examined real-world patterns of tumor necrosis factor inhibitor (TNFi) use for radiographi..
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Hemato-oncology / Original Article
Prognostic analysis according to adjuvant chemotherapy and anti-HER2 therapy following surgery in T1a/b HER2-positive breast cancer
Woochan Park, Koung Jin Suh, Jeongmin Seo, Se Hyun Kim, Yu Jung Kim, Hee-Chul Shin, Eun-Kyu Kim, In Ah Kim, So Yeon Park, Jee Hyun Kim
Korean J Intern Med. 2026;41(4):734-747. Published online July 1, 2026
Background/Aims: The optimal adjuvant chemotherapy and anti-human epidermal growth factor receptor 2 (HER2) therapy regimen following surgery for T1a/b HER2-positive breast cancer remains debatable.
Methods: In this single-center retrospective analysis, we examined the postoperative treatment strat..
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Gastroenterology / Original Article
Comparison between ligation-assisted and precutting endoscopic mucosal resection for small rectal neuroendocrine tumors: a CHASID study
Sunghyeok Ryou, Yunho Jung, Dae Sung Kim, Hee Seok Moon, Hoon Sup Koo, Hyun Deok Shin, Ki Bae Bang, Kyu Chan Huh; Chungcheong-Daejeon Association for the Study of Intestinal Diseases (CHASID)
Korean J Intern Med. 2026;41(3):432-440. Published online May 1, 2026
Background/Aims: Few studies have compared modified endoscopic mucosal resection (EMR) techniques for small rectal neuroendocrine tumors (NETs). This study evaluated the clinical outcomes of ligation-assisted EMR (EMR-L) and precutting EMR (EMR-P) for the treatment of small rectal NETs.
Methods: We..
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Hemato-oncology / Review
Germline DDX41 mutations in myeloid neoplasms: a comprehensive review
Je-Hwan Lee, Eun-Hye Hur, Young-Uk Cho
Korean J Intern Med. 2026;41(3):396-410. Published online May 1, 2026
DEAD-box helicase 41 (DDX41)-associated myeloid neoplasms represent a distinct hereditary cancer syndrome and have emerged as the most common form of genetic predisposition to adult-onset hematologic malignancies, accounting for 3–5% of adults with myelodysplastic syndrome and acute myeloid..
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Gastroenterology / Original Article
Submucosal saline injection and mini-probe endoscopic ultrasound to assess endoscopic resectability of colorectal subepithelial tumors
Jung-Bin Park, Ji Eun Baek, June Hwa Bae, Seung Wook Hong, Sung Wook Hwang, Sang Hyoung Park, Byong Duk Ye, Jeong-Sik Byeon, Seung-Jae Myung, Suk-Kyun Yang, Dong-Hoon Yang
Korean J Intern Med. 2025;40(4):592-605. Published online July 1, 2025
Background/Aims: This study aimed to evaluate the feasibility and outcomes of mini-probe endoscopic ultrasound (mEUS) followed by submucosal saline injection (SSI-mEUS) for assessing the endoscopic resectability of colorectal subepithelial lesions (SELs).
Methods: From January 2020 to December 2023..
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Gastroenterology / Review
Role of endoscopic ultrasound in the diagnosis and local ablative therapy of pancreatic neuroendocrine tumors
Yun Je Song, Jun Kyeong Lim, Jun-Ho Choi
Korean J Intern Med. 2025;40(2):170-180. Published online February 25, 2025
Advancements in diagnostic technology have led to the improved detection of pancreatic neuroendocrine tumors (PNETs) and thus to an increase in the number of reported cases. Endoscopic ultrasound (EUS) technology, including in combination with contrast-enhanced harmonic imaging, aids in distinguishi..
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Gastroenterology / Original Article
Clinical course of asymptomatic duodenal subepithelial lesions
Seokin Kang, Kwangbeom Park, Do Hoon Kim, Yuri Kim, Hee Kyong Na, Jeong Hoon Lee, Ji Yong Ahn, Kee Wook Jung, Kee Don Choi, Ho June Song, Gin Hyug Lee, Hwoon-Yong Jung
Korean J Intern Med. 2024;39(4):603-611. Published online June 13, 2024
Background/Aims: There is limited knowledge regarding the management of duodenal subepithelial lesions (SELs) owing to a lack of understanding of their natural course. This study aimed to assess the natural course of asymptomatic duodenal SELs and provide management recommendations.
Methods: Patien..
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Gastroenterology / Original Article
Endoscopic mucosal resection using anchored snare Tip-in versus precut technique for small rectal neuroendocrine tumors
Seung Wook Hong, Dong-Hoon Yang, Yoo Jin Lee, Dong Hoon Baek, Jaeyoung Chun, Hyun Gun Kim, Sung Joo Kim, Seung-Mo Hong, Dae-Seong Myung
Korean J Intern Med. 2024;39(2):238-247. Published online December 8, 2023
Background/Aims: Small rectal neuroendocrine tumors (NETs) can be treated with modified endoscopic mucosal resection (EMR). However, an optimal EMR method remains to be established. We aimed to assess the non-inferiority of Tip-in EMR versus precut EMR (EMR-P) for treating rectal NETs.
Methods: Thi..
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Rheumatology / Original Article
Comparative effectiveness of JAK inhibitors and biologic disease-modifying antirheumatic drugs in patients with rheumatoid arthritis
Soo-Kyung Cho, Hyoungyoung Kim, Yeo-Jin Song, Hye Won Kim, Eunwoo Nam, Shin-Seok Lee, Hye-Soon Lee, Sung-Hoon Park, Yeon-Ah Lee, Min-Chan Park, Sung Hae Chang, Hyoun-Ah Kim, Seung-Ki Kwok, Hae-Rim Kim, Hyun-Sook Kim, Bo Young Yoon, Wan-Sik Uhm, Yong-Gil Kim, Jae Hoon Kim, Jisoo Lee, Jeongim Choi, Yoon-Kyoung Sung
Korean J Intern Med. 2023;38(4):546-556. Published online June 20, 2023
Background/Aims: We aimed to compare the effectiveness and safety of Janus kinase inhibitors (JAKi) vs. biologic disease- modifying antirheumatic drugs (bDMARD) in Korean patients with rheumatoid arthritis (RA) who had an inadequate response to conventional synthetic DMARDs.
Methods: A quasi-exper..
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Hemato-oncology / Original Article
Capecitabine and temozolomide for metastatic intermediate to high-grade pancreatic neuroendocrine neoplasm: a single center experience
Sathathone Douangprachanh, Hyun Jin Joo, Hyeong Min Park, Nayoung Han, Hye Young Jang, Young Hwan Koh, Tae Hyun Kim, Sung-Sik Han, Sang-Jae Park, Woo Jin Lee, Sang Myung Woo, Jung Won Chun
Korean J Intern Med. 2022;37(6):1216-1222. Published online November 1, 2022
Background/Aims: The combination of capecitabine and temozolomide (CAPTEM) is one of the treatment options for metastatic pancreatic neuroendocrine neoplasms (pNENs). This study aims to evaluate the efficacy of CAPTEM in patients with metastatic intermediate to high-grade pancreatic neuroendocrine t..
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Gastroenterology / Original Article
Impact of early anti-TNF use on clinical outcomes in Crohn’s disease: a nationwide population-based study
Yoon Suk Jung, Minkyung Han, Sohee Park, Jae Hee Cheon
Korean J Intern Med. 2020;35(5):1104-1113. Published online April 21, 2020
Background/Aims: The optimal timing for initiation of anti-tumor necrosis factor (TNF) therapy in Crohn’s disease (CD) is still debated. Little is known about the clinical outcomes of early versus late administration of anti-TNF agents, especially in Asian CD patients. We aimed to evaluate the imp..
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Rheumatology / Original Article
Liver enzyme elevation in patients with ankylosing spondylitis treated with tumor necrosis factor inhibitors: a single-center historical cohort study
Su Jin Choi, Ji Seon Oh, Seokchan Hong, Chang-Keun Lee, Bin Yoo, Yong-Gil Kim
Korean J Intern Med. 2020;35(3):723-731. Published online December 26, 2019
Background/Aims: Tumor necrosis factor inhibitors (TNFi) have been known to induce liver enzyme elevation, sometimes associated with viral reactivation or toxic hepatitis. We evaluated the incidence and risk factors of TNFi-associated liver enzyme elevation in Korean ankylosing spondylitis (AS) pati..
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Rheumatology / Original Article
Risk of malignancy in patients with rheumatoid arthritis after anti-tumor necrosis factor therapy: results from Korean National Health Insurance claims data
Seung Min Jung, Seung-Ki Kwok, Ji Hyeon Ju, Yong-Beom Park, Sung-Hwan Park
Korean J Intern Med. 2019;34(3):669-677. Published online November 29, 2017
Background/Aims: Inhibition of tumor necrosis factor (TNF) is an effective treatment for rheumatoid arthritis (RA), but safety concerns about malignancy remain. The aim of this study was to evaluate cancer risk in RA patients treated with TNF inhibitors (TNFi), based on Korean Nationwide Health Insu..
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Hemato-oncology / Original Article
Comparison of the morphologic criteria (RECIST) and metabolic criteria (EORTC and PERCIST) in tumor response assessments: a pooled analysis
Hong Deok Kim, Bum Jun Kim, Hyeong Su Kim, Jung Han Kim
Korean J Intern Med. 2019;34(3):608-617. Published online January 17, 2018
Background/Aims: The Positron Emission Tomography Response Criteria in Solid Tumors (PERCIST) or European Organization for Research and Treatment of Cancer (EORTC) criteria are used to assess metabolic tumor responses. However, tumor responses have shown considerable discrepancies between the morpho..
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Hemato-oncology / Original Article
The impact of primary tumor location in patients with metastatic colorectal cancer: a Korean Cancer Study Group CO12-04 study
Jae Ho Byun, Joong Bae Ahn, Sun Young Kim, Jung Hun Kang, Dae Young Zang, Seok Yun Kang, Myoung Joo Kang, Byoung Yong Shim, Sun Kyung Baek, Bong-Seog Kim, Kyung Hee Lee, Soon Il Lee, Sang-Hee Cho, Byeong Seok Sohn, Samyong Kim, In Gyu Hwang, Eun Mi Nam, Bong-Gun Seo, Sang Cheul Oh, Myung-Ah Lee, Sang-Cheol Lee, Ji Hyung Hong, Young Suk Park
Korean J Intern Med. 2019;34(1):165-177. Published online November 28, 2017
Background/Aims: Colorectal cancer is associated with different anatomical, biological, and clinical characteristics. We determined the impact of the primary tumor location in patients with metastatic colorectal cancer (mCRC).
Methods: Demographic data and clinical information were collected from 1..
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Rheumatology / Original Article
Systemic review: agreement between the latent tuberculosis screening tests among patients with rheumatic diseases
Junhee Pyo, Soo-Kyung Cho, Dam Kim, Yoon-Kyoung Sung
Korean J Intern Med. 2018;33(6):1241-1251. Published online December 28, 2017
Background/Aims: To estimate the level of agreement and positivity rates of latent tuberculosis infection (LTBI) tests prior to the use of tumor necrosis factor (TNF) inhibitors in relation to underlying rheumatic diseases and endemic tuberculosis levels.
Methods: The Ovid-Medline, Embase, and Coch..
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Rheumatology / Original Article
Rapid onset of efficacy predicts response to therapy with certolizumab plus methotrexate in patients with active rheumatoid arthritis
Young Mo Kang, Young-Eun Park, Won Park, Jung-Yoon Choe, Chul-Soo Cho, Seung-Cheol Shim, Sang Cheol Bae, Chang-Hee Suh, Hoon-Suk Cha, Eun Mi Koh, Yeong-Wook Song, Bin Yoo, Shin-Seok Lee, Min-Chan Park, Sang-Heon Lee, Catherine Arendt, Willem Koetse, Soo-Kon Lee
Korean J Intern Med. 2018;33(6):1224-1233. Published online January 5, 2018
Background/Aims: The objective of this study was to determine the efficacy and safety of add-on therapy with certolizumab pegol (CZP) in active rheumatoid arthritis (RA) patients of a single ethnicity.
Methods: In this 24-week, phase 3, randomized, double-blind, placebo-controlled trial, eligible p..
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Gastroenterology / Original Article
Association of a genetic polymorphism of IL1RN with risk of acute pancreatitis in a Korean ethnic group
Jin Woo Park, Ja Sung Choi, Ki Joon Han, Sang Heun Lee, Eui Joo Kim, Jae Hee Cho
Korean J Intern Med. 2018;33(6):1103-1110. Published online November 10, 2017
Background/Aims: Several epidemiological studies have validated the association of interleukin gene polymorphisms with acute pancreatitis (AP) in different populations. However, there have been few studies in Asian ethnic groups. We aimed to investigate the relationships between inflammatory cytoki..
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Rheumatology / Original Article
Isoniazid treatment for latent tuberculosis infection is tolerable for rheumatoid arthritis patients receiving tumor necrosis factor inhibitor therapy
Yoon-Kyoung Sung, Soo-Kyung Cho, Dam Kim, Soyoung Won, Chan-Bum Choi, Tae-Hwan Kim, Jae-Bum Jun, Dae-Hyun Yoo, Sang-Cheol Bae
Korean J Intern Med. 2018;33(5):1016-1024. Published online March 13, 2017
Background/Aims: To evaluate the impact of isoniazid (INH) treatment for latent tuberculosis infection (LTBI) on the development of liver function test (LFT) abnormality and the persistence of tumor necrosis factor (TNF) inhibitors in rheumatoid arthritis (RA) patients.
Methods: We retrospectively ..
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