Background: The taxonomic status of house mice (Mus musculus) on the Korean Peninsula has long been debated due to conflicting morphological classifications and limited genetic evidence. Historically, three subspecies (M. m.molossinus, M. m. utsuryonis, and M. m. yamashinai) have been proposed based on external traits, although the validity of these proposals remains uncertain. Thus, this study aimed to integrate genetic and morphological analyses to clarify the phylogenetic relationships of Korean mice relative to the well-known primary M. musculus subspecies and evaluate the taxonomic distinctiveness. Results: Genetic analysis of mitochondrial DNA (cytb gene) from mice across Korea, including islands, mountains, and agricultural fields, confirmed that these mice belong to the Eurasian M. m. musculus lineage. Morphologically, Korean mice exhibited tail ratios consistent with previously assigned subspecies, suggesting these traits represent intraspecific variation within M. m. musculus. Craniometric analyses revealed distinctive features, such as a shorter, narrower premaxillary tooth-patch width and a longer maxillary tooth-row length, thereby distinguishing these mice from laboratory strains derived from M. m. domesticus. These cranial configurations, visualized via three-dimensional micro-computed tomography scans, further supported the morphological divergence of these mice from other subspecies. Conclusions Our findings indicate that Korean house mice belong to a single subspecific group within M. m.musculus, with observed morphological variations reflecting local adaptation rather than distinct taxonomic divisions.The Korean Peninsula likely served as an ecological bridge, facilitating the spatiotemporal diversification of M. m.musculus across East Eurasia. This study resolves longstanding taxonomic ambiguities and underscores the subspecific status of Korean house mice within M. m. musculus. These insights provide a foundation for understanding the biogeographic history of human commensal species and future biomedical research utilizing wild-derived mouse models.

Purpose: This study investigated the recurrence patterns and timing in patients with pathologic N2 (pN2) non-small cell lung cancer (NSCLC) according to the residual tumor (R) descriptor proposed by the International Association for the Study of Lung Cancer (IASLC). Materials and Methods: From 2004 to 2021, patients with pN2 NSCLC who underwent anatomical resection were analyzed according to the IASLC R criteria using medical records from a single center. Survival analysis was performed using Cox proportional hazards models. Recurrence patterns between complete (R0) and uncertain resections (R[un]) were compared. Results: In total, 1,373 patients were enrolled in this study: 576 (42.0%) in R0, 286 (20.8%) in R(un), and 511 (37.2%) in R1/R2 according to the IASLC R criteria. The most common reason for R(un) classification was positivity for the highest lymph node (88.8%). In multivariable analysis, the hazard ratios for recurrence in R(un) and R1/R2 compared to R0 were 1.18 (95% confidence interval [CI], 0.96–1.46) and 1.58 (1.31–1.90), respectively. The hazard rate curves displayed similar patterns among groups, peaking at approximately 12 months after surgery. There was a significant difference in distant recurrence patterns between R0 and R(un). Further analysis after stratification with the IASLC N2 descriptor showed significant differences in distant recurrence patterns between R0 and R(un) in patients pN2a1 and pN2a2 disease, but not in those with pN2b disease. Conclusion The IASLC R criteria has prognostic relevance in patients with pN2 NSCLC. R(un) is a highly heterogeneous group, and the involvement of the highest mediastinal lymph node can affect distant recurrence patterns.

Background: Chromosomal alterations serve as diagnostic and prognostic markers in acute leukemia. Given the evolving landscape of chromosomal abnormalities in acute leukemia, we previously studied these over two periods. In this study, we investigated the frequency of these abnormalities and clinical trends in acute leukemia in Korea across three time periods. Methods: We retrospectively analyzed data from 1,787 patients with acute leukemia (319 children and 1,468 adults) diagnosed between 2006 and 2020. Conventional cytogenetics, FISH, and multiplex quantitative PCR were used for analysis. The patient groups were divided according to the following three study periods: 2006–2009 (I), 2010–2015 (II), and 2016–2020 (III). Results: Chromosomal aberrations were detected in 92% of patients. The PML::RARA translocation was the most frequent. Over the 15-yr period, chromosomal aberrations showed minimal changes, with specific fusion transcripts being common among patients.ALL was more prevalent in children than in adults and correlated significantly with the ETV6::RUNX1 and RUNX1::RUNX1T1 aberrations. The incidence of ALL increased during the three periods, with PML::RARA remaining common. Conclusions The frequency of chromosomal abnormalities in acute leukemia has changed subtly over time. Notably, the age of onset of adult AML has continuously increased. Our results may help in establishing diagnoses and clinical treatment strategies and developing various molecular diagnostic platforms.

Purpose: This study investigated the recurrence patterns and timing in patients with pathologic N2 (pN2) non-small cell lung cancer (NSCLC) according to the residual tumor (R) descriptor proposed by the International Association for the Study of Lung Cancer (IASLC). Materials and Methods: From 2004 to 2021, patients with pN2 NSCLC who underwent anatomical resection were analyzed according to the IASLC R criteria using medical records from a single center. Survival analysis was performed using Cox proportional hazards models. Recurrence patterns between complete (R0) and uncertain resections (R[un]) were compared. Results: In total, 1,373 patients were enrolled in this study: 576 (42.0%) in R0, 286 (20.8%) in R(un), and 511 (37.2%) in R1/R2 according to the IASLC R criteria. The most common reason for R(un) classification was positivity for the highest lymph node (88.8%). In multivariable analysis, the hazard ratios for recurrence in R(un) and R1/R2 compared to R0 were 1.18 (95% confidence interval [CI], 0.96–1.46) and 1.58 (1.31–1.90), respectively. The hazard rate curves displayed similar patterns among groups, peaking at approximately 12 months after surgery. There was a significant difference in distant recurrence patterns between R0 and R(un). Further analysis after stratification with the IASLC N2 descriptor showed significant differences in distant recurrence patterns between R0 and R(un) in patients pN2a1 and pN2a2 disease, but not in those with pN2b disease. Conclusion The IASLC R criteria has prognostic relevance in patients with pN2 NSCLC. R(un) is a highly heterogeneous group, and the involvement of the highest mediastinal lymph node can affect distant recurrence patterns.

Purpose: This study investigated the recurrence patterns and timing in patients with pathologic N2 (pN2) non-small cell lung cancer (NSCLC) according to the residual tumor (R) descriptor proposed by the International Association for the Study of Lung Cancer (IASLC). Materials and Methods: From 2004 to 2021, patients with pN2 NSCLC who underwent anatomical resection were analyzed according to the IASLC R criteria using medical records from a single center. Survival analysis was performed using Cox proportional hazards models. Recurrence patterns between complete (R0) and uncertain resections (R[un]) were compared. Results: In total, 1,373 patients were enrolled in this study: 576 (42.0%) in R0, 286 (20.8%) in R(un), and 511 (37.2%) in R1/R2 according to the IASLC R criteria. The most common reason for R(un) classification was positivity for the highest lymph node (88.8%). In multivariable analysis, the hazard ratios for recurrence in R(un) and R1/R2 compared to R0 were 1.18 (95% confidence interval [CI], 0.96–1.46) and 1.58 (1.31–1.90), respectively. The hazard rate curves displayed similar patterns among groups, peaking at approximately 12 months after surgery. There was a significant difference in distant recurrence patterns between R0 and R(un). Further analysis after stratification with the IASLC N2 descriptor showed significant differences in distant recurrence patterns between R0 and R(un) in patients pN2a1 and pN2a2 disease, but not in those with pN2b disease. Conclusion The IASLC R criteria has prognostic relevance in patients with pN2 NSCLC. R(un) is a highly heterogeneous group, and the involvement of the highest mediastinal lymph node can affect distant recurrence patterns.

Background: This study aimed to determine the effectiveness of hospital-based case management for patients with severe mental illness. Methods: A total of 106 patients were included. To evaluate the effectiveness of hospital-based case management, the number of hospitalizations, cumulative length of hospitalization, and hospital days/year as well as functioning were compared before and after the hospital-based case management intervention. Cox regression was performed to identify variables that may influence readmission rates other than patients’ hospital-based case management interventions. Results: The number of hospitalizations decreased from 1.4±0.9 to 0.5±1.0 (p<0.001), cumulative length of hospitalization from 73.0±62.3 to 28.1±57.2 days (p<0.001), and hospital days/year from 20.0±17.1 to 7.7±15.7 days (p<0.001). The changes in Global Assessment of Functioning (GAF) Scale were 35.3±15.7 points at case management intervention, 43.7±13.9 points after 1 month of case management (p<0.001), 51.2±14.1 points after 3 months (p<0.001), and 53.1±17.6 points after 6 months (p<0.001). Demographic and clinical characteristics that influenced readmissions were GAF at admission (p=0.017), duration (p=0.042), diagnosis (p=0.019), and type of admission (p=0.001). Conclusion Hospital-based case management significantly improved readmission rates and functioning in patients with severe mental illness, supporting its continued implementation and expansion.

Background: This study aimed to determine the effectiveness of hospital-based case management for patients with severe mental illness. Methods: A total of 106 patients were included. To evaluate the effectiveness of hospital-based case management, the number of hospitalizations, cumulative length of hospitalization, and hospital days/year as well as functioning were compared before and after the hospital-based case management intervention. Cox regression was performed to identify variables that may influence readmission rates other than patients’ hospital-based case management interventions. Results: The number of hospitalizations decreased from 1.4±0.9 to 0.5±1.0 (p<0.001), cumulative length of hospitalization from 73.0±62.3 to 28.1±57.2 days (p<0.001), and hospital days/year from 20.0±17.1 to 7.7±15.7 days (p<0.001). The changes in Global Assessment of Functioning (GAF) Scale were 35.3±15.7 points at case management intervention, 43.7±13.9 points after 1 month of case management (p<0.001), 51.2±14.1 points after 3 months (p<0.001), and 53.1±17.6 points after 6 months (p<0.001). Demographic and clinical characteristics that influenced readmissions were GAF at admission (p=0.017), duration (p=0.042), diagnosis (p=0.019), and type of admission (p=0.001). Conclusion Hospital-based case management significantly improved readmission rates and functioning in patients with severe mental illness, supporting its continued implementation and expansion.

Purpose: This study aimed to describe adult living donor liver transplantation (LDLT) for acute liver failure and evaluate its clinical significance by comparing its surgical and survival outcomes with those of deceased donor liver transplantation (DDLT). Methods: We retrospectively reviewed the medical records of 267 consecutive patients (161 LDLT recipients and 106 DDLT recipients) aged 18 years or older who underwent liver transplantation between January 2006 and December 2020. Results: The mean periods from hepatic encephalopathy to liver transplantation were 5.85 days and 8.35 days for LDLT and DDLT, respectively (P = 0.091). Among these patients, 121 (45.3%) had grade III or IV hepatic encephalopathy (living, 34.8% vs. deceased, 61.3%; P < 0.001), and 38 (14.2%) had brain edema (living, 16.1% vs. deceased, 11.3%; P = 0.269) before liver transplantation. There were no significant differences in in-hospital mortality (living, 11.8% vs. deceased, 15.1%; P = 0.435), 10-year overall survival (living, 90.8% vs. deceased, 84.0%; P = 0.096), and graft survival (living, 83.5% vs. deceased, 71.3%;P = 0.051). However, postoperatively, the mean intensive care unit stay was shorter in the LDLT group (5.0 days vs. 9.5 days, P < 0.001). In-hospital mortality was associated with vasopressor use (odds ratio [OR], 3.40; 95% confidence interval [CI], 1.45–7.96; P = 0.005) and brain edema (OR, 2.75; 95% CI, 1.16–6.52; P = 0.022) of recipient at the time of transplantation. However, LDLT (OR, 1.26; 95% CI, 0.59–2.66; P = 0.553) was not independently associated with in-hospital mortality. Conclusion LDLT is feasible for acute liver failure when organs from deceased donors are not available.

Background: This study aimed to determine the effectiveness of hospital-based case management for patients with severe mental illness. Methods: A total of 106 patients were included. To evaluate the effectiveness of hospital-based case management, the number of hospitalizations, cumulative length of hospitalization, and hospital days/year as well as functioning were compared before and after the hospital-based case management intervention. Cox regression was performed to identify variables that may influence readmission rates other than patients’ hospital-based case management interventions. Results: The number of hospitalizations decreased from 1.4±0.9 to 0.5±1.0 (p<0.001), cumulative length of hospitalization from 73.0±62.3 to 28.1±57.2 days (p<0.001), and hospital days/year from 20.0±17.1 to 7.7±15.7 days (p<0.001). The changes in Global Assessment of Functioning (GAF) Scale were 35.3±15.7 points at case management intervention, 43.7±13.9 points after 1 month of case management (p<0.001), 51.2±14.1 points after 3 months (p<0.001), and 53.1±17.6 points after 6 months (p<0.001). Demographic and clinical characteristics that influenced readmissions were GAF at admission (p=0.017), duration (p=0.042), diagnosis (p=0.019), and type of admission (p=0.001). Conclusion Hospital-based case management significantly improved readmission rates and functioning in patients with severe mental illness, supporting its continued implementation and expansion.

Background: This study aimed to determine the effectiveness of hospital-based case management for patients with severe mental illness. Methods: A total of 106 patients were included. To evaluate the effectiveness of hospital-based case management, the number of hospitalizations, cumulative length of hospitalization, and hospital days/year as well as functioning were compared before and after the hospital-based case management intervention. Cox regression was performed to identify variables that may influence readmission rates other than patients’ hospital-based case management interventions. Results: The number of hospitalizations decreased from 1.4±0.9 to 0.5±1.0 (p<0.001), cumulative length of hospitalization from 73.0±62.3 to 28.1±57.2 days (p<0.001), and hospital days/year from 20.0±17.1 to 7.7±15.7 days (p<0.001). The changes in Global Assessment of Functioning (GAF) Scale were 35.3±15.7 points at case management intervention, 43.7±13.9 points after 1 month of case management (p<0.001), 51.2±14.1 points after 3 months (p<0.001), and 53.1±17.6 points after 6 months (p<0.001). Demographic and clinical characteristics that influenced readmissions were GAF at admission (p=0.017), duration (p=0.042), diagnosis (p=0.019), and type of admission (p=0.001). Conclusion Hospital-based case management significantly improved readmission rates and functioning in patients with severe mental illness, supporting its continued implementation and expansion.