1.Comparison of the Gut Microbiota of Preterm Infants Born before 32-Week Gestation with Feeding Intolerance
Bo Kyeong JIN ; Hyunsu KIM ; Cho Ae LEE ; Hye-Rim KIM
Neonatal Medicine 2025;32(1):21-29
Purpose:
Feeding intolerance (FI) is a prevalent clinically sequential condition in preterm infants. To clarify its relationship with the gut microbiota, we compared microbial diversity and taxonomic composition at 2 and 4 weeks of age in infants born before 32 weeks of gestation.
Methods:
Between August 2021 and December 2022, we prospectively enrolled infants who delivered before 32 weeks of gestation and were admitted to the neonatal intensive care unit at CHA Bundang Medical Center. Forty-four preterm infants were grouped based on the presence (n=16) or absence (n=28) of FI. Fecal samples were obtained at 2 and 4 weeks after birth and analyzed using 16S rRNA gene sequencing to determine microbial profiles.
Results:
Microbial α-diversity and β-diversity did not differ significantly between groups at either time point. At the genus level, Staphylococcus was significantly more abundant in the FI group than in the feeding tolerance group at 2 weeks postnatal age (P=0.016). Linear discriminant analysis effect size revealed that Staphylococcus, Pseudomonas, and Escherichia were markedly enriched in the FI group at all time points.
Conclusion
Early colonization by potentially pathogenic genera, particularly Staphylococcus, may precede the development of FI in preterm infants. These findings highlight the potential microbial composition associated with FI and may provide preliminary insights for future microbiome-targeted research in neonatal care.
2.Comparison of the Gut Microbiota of Preterm Infants Born before 32-Week Gestation with Feeding Intolerance
Bo Kyeong JIN ; Hyunsu KIM ; Cho Ae LEE ; Hye-Rim KIM
Neonatal Medicine 2025;32(1):21-29
Purpose:
Feeding intolerance (FI) is a prevalent clinically sequential condition in preterm infants. To clarify its relationship with the gut microbiota, we compared microbial diversity and taxonomic composition at 2 and 4 weeks of age in infants born before 32 weeks of gestation.
Methods:
Between August 2021 and December 2022, we prospectively enrolled infants who delivered before 32 weeks of gestation and were admitted to the neonatal intensive care unit at CHA Bundang Medical Center. Forty-four preterm infants were grouped based on the presence (n=16) or absence (n=28) of FI. Fecal samples were obtained at 2 and 4 weeks after birth and analyzed using 16S rRNA gene sequencing to determine microbial profiles.
Results:
Microbial α-diversity and β-diversity did not differ significantly between groups at either time point. At the genus level, Staphylococcus was significantly more abundant in the FI group than in the feeding tolerance group at 2 weeks postnatal age (P=0.016). Linear discriminant analysis effect size revealed that Staphylococcus, Pseudomonas, and Escherichia were markedly enriched in the FI group at all time points.
Conclusion
Early colonization by potentially pathogenic genera, particularly Staphylococcus, may precede the development of FI in preterm infants. These findings highlight the potential microbial composition associated with FI and may provide preliminary insights for future microbiome-targeted research in neonatal care.
3.Unusual Metachronous Renal Pelvis and Colon Metastases in a Patient with Endometrial Cancer: A Case Report
Juin KIM ; Chul-min LEE ; Bo-Kyeong KANG ; Mimi KIM
Journal of the Korean Society of Radiology 2025;86(2):279-283
Endometrial cancer commonly metastasizes to the pelvic and para-aortic lymph nodes, vagina, peritoneum, and lungs. Unusual sites of metastasis include the bone, brain, abdominal wall, muscles, and intra-abdominal organs. To our knowledge, there have been no documented cases of synchronous or metachronous metastasis of endometrial cancer to the renal pelvis or colon. Metastatic tumors in the renal pelvis and colon indicate nonspecific radiological findings, making them difficult to distinguish from primary tumors. We describe a case of a 55-year-old female previously treated for endometrial cancer, who was subsequently found to have metastatic masses in the renal pelvis and colon. The two masses were initially misidentified as primary urothelial carcinoma and colon adenocarcinoma.
4.Comparison of the Gut Microbiota of Preterm Infants Born before 32-Week Gestation with Feeding Intolerance
Bo Kyeong JIN ; Hyunsu KIM ; Cho Ae LEE ; Hye-Rim KIM
Neonatal Medicine 2025;32(1):21-29
Purpose:
Feeding intolerance (FI) is a prevalent clinically sequential condition in preterm infants. To clarify its relationship with the gut microbiota, we compared microbial diversity and taxonomic composition at 2 and 4 weeks of age in infants born before 32 weeks of gestation.
Methods:
Between August 2021 and December 2022, we prospectively enrolled infants who delivered before 32 weeks of gestation and were admitted to the neonatal intensive care unit at CHA Bundang Medical Center. Forty-four preterm infants were grouped based on the presence (n=16) or absence (n=28) of FI. Fecal samples were obtained at 2 and 4 weeks after birth and analyzed using 16S rRNA gene sequencing to determine microbial profiles.
Results:
Microbial α-diversity and β-diversity did not differ significantly between groups at either time point. At the genus level, Staphylococcus was significantly more abundant in the FI group than in the feeding tolerance group at 2 weeks postnatal age (P=0.016). Linear discriminant analysis effect size revealed that Staphylococcus, Pseudomonas, and Escherichia were markedly enriched in the FI group at all time points.
Conclusion
Early colonization by potentially pathogenic genera, particularly Staphylococcus, may precede the development of FI in preterm infants. These findings highlight the potential microbial composition associated with FI and may provide preliminary insights for future microbiome-targeted research in neonatal care.
5.Comparison of the Gut Microbiota of Preterm Infants Born before 32-Week Gestation with Feeding Intolerance
Bo Kyeong JIN ; Hyunsu KIM ; Cho Ae LEE ; Hye-Rim KIM
Neonatal Medicine 2025;32(1):21-29
Purpose:
Feeding intolerance (FI) is a prevalent clinically sequential condition in preterm infants. To clarify its relationship with the gut microbiota, we compared microbial diversity and taxonomic composition at 2 and 4 weeks of age in infants born before 32 weeks of gestation.
Methods:
Between August 2021 and December 2022, we prospectively enrolled infants who delivered before 32 weeks of gestation and were admitted to the neonatal intensive care unit at CHA Bundang Medical Center. Forty-four preterm infants were grouped based on the presence (n=16) or absence (n=28) of FI. Fecal samples were obtained at 2 and 4 weeks after birth and analyzed using 16S rRNA gene sequencing to determine microbial profiles.
Results:
Microbial α-diversity and β-diversity did not differ significantly between groups at either time point. At the genus level, Staphylococcus was significantly more abundant in the FI group than in the feeding tolerance group at 2 weeks postnatal age (P=0.016). Linear discriminant analysis effect size revealed that Staphylococcus, Pseudomonas, and Escherichia were markedly enriched in the FI group at all time points.
Conclusion
Early colonization by potentially pathogenic genera, particularly Staphylococcus, may precede the development of FI in preterm infants. These findings highlight the potential microbial composition associated with FI and may provide preliminary insights for future microbiome-targeted research in neonatal care.
6.Unusual Metachronous Renal Pelvis and Colon Metastases in a Patient with Endometrial Cancer: A Case Report
Juin KIM ; Chul-min LEE ; Bo-Kyeong KANG ; Mimi KIM
Journal of the Korean Society of Radiology 2025;86(2):279-283
Endometrial cancer commonly metastasizes to the pelvic and para-aortic lymph nodes, vagina, peritoneum, and lungs. Unusual sites of metastasis include the bone, brain, abdominal wall, muscles, and intra-abdominal organs. To our knowledge, there have been no documented cases of synchronous or metachronous metastasis of endometrial cancer to the renal pelvis or colon. Metastatic tumors in the renal pelvis and colon indicate nonspecific radiological findings, making them difficult to distinguish from primary tumors. We describe a case of a 55-year-old female previously treated for endometrial cancer, who was subsequently found to have metastatic masses in the renal pelvis and colon. The two masses were initially misidentified as primary urothelial carcinoma and colon adenocarcinoma.
7.Unusual Metachronous Renal Pelvis and Colon Metastases in a Patient with Endometrial Cancer: A Case Report
Juin KIM ; Chul-min LEE ; Bo-Kyeong KANG ; Mimi KIM
Journal of the Korean Society of Radiology 2025;86(2):279-283
Endometrial cancer commonly metastasizes to the pelvic and para-aortic lymph nodes, vagina, peritoneum, and lungs. Unusual sites of metastasis include the bone, brain, abdominal wall, muscles, and intra-abdominal organs. To our knowledge, there have been no documented cases of synchronous or metachronous metastasis of endometrial cancer to the renal pelvis or colon. Metastatic tumors in the renal pelvis and colon indicate nonspecific radiological findings, making them difficult to distinguish from primary tumors. We describe a case of a 55-year-old female previously treated for endometrial cancer, who was subsequently found to have metastatic masses in the renal pelvis and colon. The two masses were initially misidentified as primary urothelial carcinoma and colon adenocarcinoma.
8.Comparison of the Gut Microbiota of Preterm Infants Born before 32-Week Gestation with Feeding Intolerance
Bo Kyeong JIN ; Hyunsu KIM ; Cho Ae LEE ; Hye-Rim KIM
Neonatal Medicine 2025;32(1):21-29
Purpose:
Feeding intolerance (FI) is a prevalent clinically sequential condition in preterm infants. To clarify its relationship with the gut microbiota, we compared microbial diversity and taxonomic composition at 2 and 4 weeks of age in infants born before 32 weeks of gestation.
Methods:
Between August 2021 and December 2022, we prospectively enrolled infants who delivered before 32 weeks of gestation and were admitted to the neonatal intensive care unit at CHA Bundang Medical Center. Forty-four preterm infants were grouped based on the presence (n=16) or absence (n=28) of FI. Fecal samples were obtained at 2 and 4 weeks after birth and analyzed using 16S rRNA gene sequencing to determine microbial profiles.
Results:
Microbial α-diversity and β-diversity did not differ significantly between groups at either time point. At the genus level, Staphylococcus was significantly more abundant in the FI group than in the feeding tolerance group at 2 weeks postnatal age (P=0.016). Linear discriminant analysis effect size revealed that Staphylococcus, Pseudomonas, and Escherichia were markedly enriched in the FI group at all time points.
Conclusion
Early colonization by potentially pathogenic genera, particularly Staphylococcus, may precede the development of FI in preterm infants. These findings highlight the potential microbial composition associated with FI and may provide preliminary insights for future microbiome-targeted research in neonatal care.
9.Corticosteroid Therapy Duration and Dosage According to the Timing of Treatment Initiation for Post-COVID-19 Organizing Pneumonia
Chang-Seok YOON ; Hwa-Kyung PARK ; Jae-Kyeong LEE ; Bo-Gun KHO ; Tae-Ok KIM ; Hong-Joon SHIN ; Yong-Soo KWON ; Sung-Chul LIM ; Yu-Il KIM
Chonnam Medical Journal 2024;60(3):166-173
COVID-19 can lead to pulmonary complications, including organizing pneumonia.Steroids are essential in treating post-COVID-19 organizing pneumonia. However, research on the clinical benefits of initiating steroid treatment early for this condition is limited. To investigate the steroid initiation time in its association with treatment duration and corticosteroid dose for treating post-COVID-19 organizing pneumonia, we analyzed the data of 91 patients with post-COVID-19 organizing pneumonia at Chonnam National University Hospital between October 2020 and December 2022.Patients were categorized into early and late groups based on time from COVID-19 diagnosis to steroid initiation time for organizing pneumonia. The mean time interval between COVID-19 infection and steroid initiation time for treating organizing pneumonia, was 18.4±8.6 days. Within the early treatment group (treatment initiated <18.4 days after COVID-19), which included 55 patients, the mean duration of steroid treatment was 43.1±18.3days. In contrast, the late treatment group (initiated ≥18.4 days after COVID-19), which consisted of 36 patients, had a longer mean duration of steroid treatment 59.1±22.6 days) (p<0.01). Regarding corticosteroid dosing, the early treatment group had an average dosage of 0.5±0.3 mg/kg/day, in contrast to the late group, which averaged 0.8±0.3 mg/kg/day (p<0.01). Regression analysis showed steroid initiation time significantly influenced treatment duration (=0.80 , p<0.01) and dosage (=0.03, p<0.01). The clinical benefits of early steroid treatment for post-COVID-19 organizing pneumonia may lie in its association with reduced steroid treatment duration and dosage.
10.Social stigma and discrimination towards people living with HIV infection and AIDS patients
Sori KWON ; Bo Kyeong SEO ; Sunguk SO ; Sojoong LEE
Journal of the Korean Medical Association 2024;67(3):194-203
Social stigma and discrimination are major barriers to an effective national response to human immunodeficiency virus (HIV)/acquired immunodeficiency syndrome (AIDS), and there have been repeated calls to transform the current surveillance-focused policy. Serious instances of discrimination and clinical service failings increase the urgency and importance of addressing issues relevant to AIDS-related stigma. Yet, progress in achieving effective and people-centered responses to AIDS is insufficient.Current Concepts: Based on a comprehensive multi-sectoral review of a wide range of literature, this article examines the key features of AIDS-related stigma in South Korea and evaluates governmental and organizational efforts to redress them. Three major areas, of issues and possibilities for change, are identified: (1) addressing discrimination in health care settings, (2) decriminalization of HIV transmission, according to the Undetectable=Untransmittable (U=U) principle, (3) improving the quality of life and social inclusion of people living with HIV.Discussion and Conclusion: An extensive examination of existing evidence on AIDS-related stigma, guided by the authors’ long-term experience of public participation and civic empowerment, suggests that by placing these three issues at the center of the national response to AIDS, significant improvement in the AIDS care continuum is achievable. People-centered service delivery models that focus on dismantling structural barriers and incorporating leadership from key populations will enable high-impact public health responses to AIDS and HIV infection.

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