1.Korean colorectal cancer screening guidelines for asymptomatic, average-risk adults: the 2025 revision
EunKyo KANG ; Jae Myung CHA ; Seo Young KANG ; Kiheon LEE ; Su Young KIM ; Younghoon KIM ; An Na SEO ; Hyo-Jin KANG ; Jong Keon JANG ; Kwang-Pil KO ; Aesun SHIN ; Dae Kyung SOHN ; Youngki HONG ; Eun-Jung CHO ; Minje HAN ; Soo Young KIM ; Hyeon Ji LEE ; Chang Kyun CHOI ; Mina SUH
Journal of the Korean Medical Association 2026;69(3):268-280
Purpose:
To develop the 2025 update to the Korean colorectal cancer (CRC) screening guidelines by systematically evaluating recent evidence, integrating domestic data, and addressing changes since the 2015 guideline revision, thereby providing an evidence-based standard for clinicians and policymakers.
Methods:
A multidisciplinary committee developed the guidelines using the Grading of Recommendations, Assessment, Development and Evaluation (GRADE) methodology. The process included formulation of three key questions addressing screening efficacy, diagnostic accuracy, and optimal screening age and interval. A systematic review of international guidelines and primary literature was conducted, yielding 327 eligible studies. In addition, a utility-based analysis using a Markov model was performed to determine optimal screening ages and intervals.
Results:
The evidence synthesis identified high-certainty evidence supporting the use of the fecal immunochemical test (FIT) for reducing CRC mortality and moderate-certainty evidence for colonoscopy. Evidence for computed tomographic colonography (CTC) and stool DNA testing was rated as very low certainty. Based on the evidence review and cost-utility analysis, the committee conditionally recommends CRC screening for asymptomatic, average-risk adults aged 45–74 years using either colonoscopy every 10 years or FIT every 1–2 years. CTC and stool DNA testing were not recommended owing to insufficient evidence.
Conclusion
The 2025 Korean Guidelines for Colorectal Cancer Screening present updated, evidence-based recommendations tailored to the domestic healthcare context. By conditionally endorsing both colonoscopy and FIT for individuals aged 45–74 years, these guidelines aim to improve population-level screening effectiveness and reduce the burden of CRC in South Korea.
2.Process of developing basic veterinary clinical performance guidelines based on common clinical manifestations in Korea
Kichang LEE ; Heungshik S. LEE ; Yong Jun KIM ; Incheol PARK ; Kangmoon SEO ; Seong Mok JEONG ; Kyu-Woan CHO ; Jin Young CHUNG ; Dongbin LEE ; Chun-Sik BAE ; Sung-Lim LEE ; Ki-Jeong NA ; Sooyoung CHOI ; Inseong JEONG ; Pan Dong RYU ; Sang-Soep NAHM
Journal of Veterinary Science 2026;27(2):e24-
Objective:
To explain process of developing basic veterinary clinical performance guidelines, based on frequently observable clinical manifestations, thereby supporting competencybased veterinary education in Korea.
Methods:
A structured review of learning outcomes established by Korean Association of Veterinary Medical Colleges (KAVMC) was conducted by a planning committee including veterinary educators, practitioners, and advisory members. Owner-oriented descriptions were used to frame each performance task, and each was mapped to corresponding learning outcomes. These tasks were aligned with learning outcomes recommended by the KAVMC to support the development of communication, clinical reasoning, and performance-related competencies among veterinary students, thereby enhancing day-one clinical readiness.
Results:
In total, 63 clinical manifestations for a guidebook format that can be used for clinical education were identified and categorized by organ systems that are described in language understandable to animal owners.
Conclusions
and Relevance: The basic veterinary clinical performance guidelines based on common clinical manifestations would serve as a vital component in veterinary education to reinforce core graduation competencies.
3.Paget-like bone remodeling disorder in a red-tailed boa (Boa constrictor constrictor): diagnosis and management
Soong-Hee YOUN ; Na-Young LEE ; Ki-Yong SHIN ; Hyeon-Joo SHIN ; Joon-Young YANG ; Dae-Yong KIM
Journal of Veterinary Science 2026;27(2):e22-
and Relevance: This case supports the value of imaging, clinicopathologic assessment, and histopathology in diagnosis, and suggests that supportive husbandry modification may provide temporary welfare benefit in affected snakes.
4.Comparison of cytochrome P450activity and mRNA expression in canine vs. human hepatocytes after acetaminophen, diclofenac, or valproic acid exposure
Jea Ran KANG ; Juyoung LEE ; Han Na SUH
Journal of Veterinary Science 2026;27(2):e19-
Objective:
This study aimed to examine the interspecies differences in CYP enzyme activity and mRNA expression between canine and human hepatocytes following treatment with acetaminophen (AAP), diclofenac (Dic), or valproic acid (VPA).
Methods:
We determined the 24-h exposure half-maximal inhibitory concentration (IC 50 ) values of AAP, Dic, and VPA in canine and human hepatocytes. Based on these IC 50 concentrations, we compared drug-induced alterations in various parameters, including immunocytochemistry, transcriptomic profiles (RNA-seq), and CYP activity, to assess changes at the gene and protein levels.
Results:
AAP and VPA increased CYP2J2 mRNA expression by 4.7- and 7.76-fold, respectively, whereas Dic increased CYP1A1 mRNA expression by 14.25-fold in canine hepatocytes. AAP, VPA, and Dic decreased CYP26B1 mRNA expression in canine hepatocytes by 0.03-, 0.12-, and 0.17-fold, respectively. Dic and VPA increased CYP1A1 mRNA expression by 5.53- and 6.66-fold, respectively, whereas AAP, VPA, and Dic decreased CYP4F22 mRNA expression by 0.03-, 0.13-, and 0.13-fold, respectively, in human hepatocytes.
Conclusions
and Relevance: The observed differences between species in CYP activity and mRNA levels in response to drug exposure highlight the importance of accurate and precise experimental models for the development of new medications.
5.Pediatric Vulvar Hematoma: Surgical Management and Developmental Considerations: Two Case Reports
Hye Mi LEE ; Ryang Woo LEE ; Eun Jung JANG ; Young Cheon NA
Journal of Wound Management and Research 2026;22(1):43-48
Pediatric vulvar hematoma typically results from straddle-type injuries and is usually managed with nonoperative measures. However, rapid progression and the risk of complications in some cases, including tissue necrosis, infection, and urinary retention, necessitate surgical intervention. The highly vascularized anatomy of the vulva allows for rapid hematoma expansion, requiring careful assessment of hematoma size, progression, functional impairment, and hemodynamic stability when determining the treatment strategy. In addition, genital trauma during developmental periods can influence self-perception and psychosexual development, making timely intervention important to prevent aesthetic and functional sequelae. We present two pediatric patients with vulvar hematoma who underwent successful surgical treatment following careful evaluation of both physical and psychological factors. This report emphasizes the importance of a comprehensive, multifaceted approach to the management of pediatric vulvar hematomas.
6.Extended therapeutic efficacy of dacarbazine following prior treatment with immune checkpoint inhibitors in metastatic melanoma: a single center retrospective study in Korea
Jihyun NA ; Jun Young KIM ; Seok-Jong LEE ; In Hee LEE ; Soo Jung LEE
Journal of Yeungnam Medical Science 2026;43(1):14-
Background:
Immune checkpoint inhibitors (ICIs) have revolutionized the treatment of advanced malignant melanoma. This study examined the real-world efficacy of dacarbazine (dimethyl triazeno imidazole carboxamide, DTIC) in patients who had previously received pembrolizumab, based on the hypothesis that prior ICI treatment enhances the therapeutic response to subsequent chemotherapy.
Methods:
This retrospective study included 71 patients with histologically confirmed malignant melanoma treated at Kyungpook National University Chilgok Hospital (Daegu, Korea) between 2011 and 2023. The patients received DTIC for unresectable stage IIIC, IIID, or IV melanoma (American Joint Committee on Cancer, 8th edition).
Results:
Among the 71 patients, the median patient age was 64 years (range, 25–89 years). When categorized by melanoma subtype, 18 patients (25.4%) had acral melanoma, 40 (56.3%) had cutaneous melanoma, and 13 (18.3%) had mucosal melanoma. Sixteen of the DTIC-treated patients had not received pembrolizumab previously (DTIC-only group), while 55 had (pem-DTIC group). The median progression-free survival was 2.3 months in the DTIC-only group and 3.9 months in the pem-DTIC group (hazard ratio [HR], 0.246; 95% confidence interval [CI], 0.106–0.576; p=0.001). The median overall survival was 6.8 months in the DTIC-only group and 19.0 months in the pem-DTIC group (HR, 0.198; 95% CI, 0.068–0.574; p=0.003). The duration of response (DoR) was 4.64 months in the DTIC group and 8.11 months in the pem-DTIC group.
Conclusion
This study demonstrated that the DoR to DTIC was prolonged following ICI therapy (4.64 months vs. 8.11 months). This indicates that prior ICI treatment may enhance tumor sensitivity to chemotherapy, making DTIC a viable option for treating refractory, relapsed, or progressive melanoma.
7.Exploring the Association Between Physical Fitness Components and Cognitive Function in Older Korean Adults: The SUPERBRAIN Exploratory Sub-study
Da Ae KIM ; Buongo CHUN ; Muncheong CHOI ; Kyunghwa SUN ; Jee Hyang JEONG ; Yoo Kyoung PARK ; Chang Hyung HONG ; Hae Ri NA ; Seong Hye CHOI ; So Young MOON ; Hong-sun SONG ; Sun Min LEE
Dementia and Neurocognitive Disorders 2026;25(1):13-24
Background:
and Purpose: Tailored physical exercise interventions have the potential to promote cognitive health in older adults and offer significant advantages for those more vulnerable to decline. The specific relationship between physical fitness and cognition among the elderly has not been clearly established. The purpose of this investigation was to assess the relationship between physical fitness and cognitive function in older Korean adults.
Methods:
Eighty-four community-dwelling older adults (mean age: 70.7±5.3 years; 81.0% female) completed a standardized physical fitness battery assessing handgrip strength, sit-and-reach, 30-second sit-to-stand, 2-minute stationary march, 3-m sit-walk-and-return, figure-8-walk, and T-wall response time. Cognitive function was evaluated using the Repeatable Battery for the Assessment of Neuropsychological Status (RBANS). Descriptive statistics, partial correlation analyses, and stepwise multiple linear regression were conducted.
Results:
Slower T-wall response time was significantly correlated with lower RBANS total index, immediate memory, and delayed memory scores. In regression models, slower T-wall response time was independently associated with lower RBANS total index (β=−0.234, p=0.026) and delayed memory scores (β=−0.295, p=0.029). The regression model for immediate memory was not statistically significant overall; therefore, no predictive conclusion was drawn for this domain. Higher education showed a significant positive association with cognitive performance.
Conclusions
Coordination, as measured by T-wall response time, emerged as the only physical fitness component consistently associated with cognitive performance in older adults. Coordination-related fitness may be an important correlate of cognitive function in older adults and a promising target for future exercise interventions.
8.Optimal use and cycling strategies of Janus kinase inhibitors in ulcerative colitis: current evidence and clinical implications from the KASID Guidelines Task Force Team
Seung Min HONG ; Dong Hyun KIM ; June Hwa BAE ; Seung Yong SHIN ; Eun Mi SONG ; Ji Eun KIM ; Young Joo YANG ; Jiyoung YOON ; Sang-Bum KANG ; Eun Soo KIM ; Seong-Eun KIM ; Seong-Jung KIM ; Jun LEE ; Soo-Young NA ; Soo Jung PARK ; Sang Hyoung PARK ; Miyoung CHOI ; Myung Ha KIM ; Won MOON ; Sung-Ae JUNG ;
Intestinal Research 2026;24(1):27-37
Janus kinase (JAK) inhibitors are an important treatment option for ulcerative colitis, providing rapid onset of action, oral administration, and efficacy even after biologic failure. The 3 approved agents—tofacitinib, filgotinib, and upadacitinib—differ in JAK isoform selectivity, leading to clinically meaningful differences in efficacy and safety. Evidence from network meta-analyses, clinical trials, and real-world studies consistently shows that upadacitinib provides the highest efficacy for induction and maintenance of remission, whereas filgotinib demonstrates the most favorable safety profile. The strong efficacy of upadacitinib and tofacitinib is particularly relevant in patients with severe disease, including acute severe ulcerative colitis, and upadacitinib maintains high efficacy regardless of prior advanced therapy exposure. JAK inhibitors also benefit extraintestinal manifestations. Although risks such as herpes zoster, serious infection, thromboembolism, and major cardiovascular events differ among agents, long-term data suggest generally acceptable safety when used appropriately. Intraclass JAK-to-JAK cycling is feasible, with about half of patients achieving steroid-free clinical remission in retrospective cohorts. Based on mechanistic, clinical, and real-world evidence, filgotinib may be a first-line option for patients with lower disease activity or when safety is a priority, whereas upadacitinib or tofacitinib may be preferred in higher disease activity. Strategically selecting agents may improve durability and outcomes.
9.Early-Onset Dementia Risk Escalates with Diabetes Duration: Insights from a Nationwide Cohort Study
Ji-Hong PARK ; Sun-Joon MOON ; Da Yeon LEE ; Ji-Hee KO ; Han Na JANG ; Hye-Mi KWON ; Se-Eun PARK ; Kyung-Do HAN ; Eun-Jung RHEE ; Won-Young LEE
Endocrinology and Metabolism 2026;41(2):235-244
Background:
The prevalence of diabetes mellitus and early-onset dementia (EOD), defined as dementia diagnosed at an age <65 years, is increasing worldwide, with significant socioeconomic implications. We investigated the association between diabetes, prediabetes, and EOD, focusing on the influence of diabetes duration on EOD risk.
Methods:
Using the Korean National Health Insurance Service database, we analyzed data from 1,979,509 patients aged 40–60 years who underwent health checkups in 2009. Patients were categorized into five groups: normal, impaired fasting glucose (IFG), newly diagnosed diabetes, diabetes duration <5 years, and diabetes duration ≥5 years. Cox proportional hazard models were used to estimate the adjusted hazard ratios (aHRs) for EOD after adjusting for demographic and clinical covariates.
Results:
During the observation period (mean 7.75 years), 8,921 patients with EOD were identified. The diabetes group demonstrated a significantly higher incidence of EOD compared to the normal group (aHR, 1.334; 95% confidence interval [CI], 1.226 to 1.451). EOD risk increased with longer diabetes duration, with the highest risk observed in patients with diabetes ≥5 years (aHR, 1.543; 95% CI, 1.368 to 1.741). No significant difference was observed between the IFG and normal groups (aHR, 0.989; 95% CI, 0.938 to 1.043). Additionally, the hypertension group exhibited a significantly higher incidence of EOD compared to the non-hypertension group (aHR, 1.364; 95% CI, 1.291 to 1.442).
Conclusion
Diabetes is independently associated with increased risk of EOD, and this risk increases with longer diabetes duration. This association remained significant regardless of the presence and duration of hypertension.
10.Awareness, Diagnostic Approaches, and Management of Heart Failure in Korea: A Nationwide Survey Comparing Primary Care Physicians and Cardiology Specialists
Sunki LEE ; Min Gyu KONG ; Mi-Hyang JUNG ; Hack-Lyoung KIM ; Jae Hyuk CHOI ; Jin Oh NA ; Yang Hyun CHO ; Dong-Ju CHOI ; Eung Ju KIM
International Journal of Heart Failure 2026;8(1):76-88
Background and Objectives:
Heart failure (HF) imposes a significant global burden, yet awareness and implementation of guideline-directed management remain suboptimal. This study evaluated HF awareness, diagnostic patterns, and therapeutic strategies among physicians in Korea.
Methods:
A nationwide online survey was conducted from July to August 2019, targeting primary care physicians (PCPs; n=8,000) and hospital-based cardiology specialists (n=1,339) across Korea. The questionnaire comprised 23 items covering baseline characteristics, perceptions of HF prognosis, diagnostic approaches, and treatment practices.
Results:
A total of 543 physicians responded (209 PCPs and 334 cardiology specialists). While the majority correctly defined HF, a substantial proportion underestimated the lifetime risk and poor prognosis. Cardiology specialists were more likely than PCPs to use objective diagnostic tools, including echocardiography (97% vs. 61%, p<0.001) and natriuretic peptide testing (90% vs. 57%, p<0.001). Among PCPs, 29% reported diagnosing HF based on symptoms and physical findings without objective testing, and 27% reported referring patients to general hospitals for diagnostic evaluation. Prescription rates for guideline-directed medical therapies, including renin-angiotensin system blockers and beta-blockers, were consistently higher among cardiology specialists.PCPs more frequently cited advanced age as a barrier to prescribing evidence-based medications.
Conclusions
Physicians’ awareness and clinical practices regarding HF in Korea remain suboptimal. Given the growing burden, high mortality, and substantial costs of HF, early detection, appropriate diagnostic evaluation, and timely referral are essential. Targeted education and system-level strategies to improve guideline implementation, particularly in primary care settings, are warranted.

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