1.Phyllodes tumors of the breast: a comprehensive review
Eun-Shin LEE ; Hyunyou KIM ; Harim OH ; You-Na SUNG ; Seungpil JUNG
Annals of Surgical Treatment and Research 2026;110(2):65-75
Phyllodes tumors are rare biphasic fibroepithelial breast neoplasms classified as benign, borderline, or malignant. Despite their rarity, malignant variants carry higher risks of recurrence and metastasis. This review synthesizes current evidence on their clinical, histopathological, and molecular characteristics, including treatment strategies and prognostic factors, emphasizing tailored management. We performed a comprehensive literature review to summarize knowledge on clinical presentation, imaging, histopathological features, surgical treatment, adjuvant therapy, and outcomes. Recent genomic and molecular research was also evaluated to identify future directions. Persistent challenges include a lack of consensus on optimal surgical margins, adjuvant radiotherapy, and follow-up protocols, highlighting the need for larger, high-quality studies. Advances in molecular profiling suggest potential for targeted therapies, especially in aggressive or metastatic cases. Due to clinical heterogeneity and the limited accuracy of core biopsies, definitive grading based on surgical histopathology remains essential for treatment planning. This review offers an updated perspective on phyllodes tumor management, identifies critical gaps, and suggests priorities for future research.
2.Stage Evaluation of Cystic Duct Cancer
Yeseul KIM ; You-Na SUNG ; Haesung JUNG ; Kyung Jin LEE ; Daegwang YOO ; Sun-Young JUN ; HyungJun CHO ; Shin HWANG ; Woohyung LEE ; Seung-Mo HONG
Cancer Research and Treatment 2025;57(2):528-538
Purpose:
Cystic duct cancers (CDCs) have been classified as extrahepatic bile duct cancers or gallbladder cancers (GBCs); however, it is unclear whether their clinical behavior is similar to that of distal extrahepatic bile duct cancers (DBDCs) or GBCs.
Materials and Methods:
T category of the CDCs was classified using current T category scheme of the GBCs and DBDCs, and clinicopathological factors were compared among 38 CDCs, 345 GBCs, and 349 DBDCs. We modified Nakata’s classifications (type 1, confined within cystic duct [CD]; combined types 2-4, extension beyond CD) and compared them.
Results:
No significant overall survival (OS) difference was observed between the patients with CDC, GBC, and DBDC. The T category of GBC staging was more accurate at distinguishing OS in patients with CDC than the DBDC staging. Patients with T3 CDC and GBC showed a significant OS difference when using the T category for GBC staging, while those with T1-T2 CDC and GBC showed no significant difference. In contrast, the T category of DBDC staging did not show any significant OS difference between patients with T1-T2 CDC and DBDC or T3 CDC and DBDC. Patients with type 1 CDC had significantly better OS than those with combined types.
Conclusion
Unlike GBCs and DBDCs, CDCs exhibit distinct clinicopathological characteristics. The OS is better when the CDC confines within the CD, compared to when it extends beyond it. Therefore, we propose a new T category scheme (T1, confined to CD; T2, invaded beyond CD) for better classifying CDCs.
3.Stage Evaluation of Cystic Duct Cancer
Yeseul KIM ; You-Na SUNG ; Haesung JUNG ; Kyung Jin LEE ; Daegwang YOO ; Sun-Young JUN ; HyungJun CHO ; Shin HWANG ; Woohyung LEE ; Seung-Mo HONG
Cancer Research and Treatment 2025;57(2):528-538
Purpose:
Cystic duct cancers (CDCs) have been classified as extrahepatic bile duct cancers or gallbladder cancers (GBCs); however, it is unclear whether their clinical behavior is similar to that of distal extrahepatic bile duct cancers (DBDCs) or GBCs.
Materials and Methods:
T category of the CDCs was classified using current T category scheme of the GBCs and DBDCs, and clinicopathological factors were compared among 38 CDCs, 345 GBCs, and 349 DBDCs. We modified Nakata’s classifications (type 1, confined within cystic duct [CD]; combined types 2-4, extension beyond CD) and compared them.
Results:
No significant overall survival (OS) difference was observed between the patients with CDC, GBC, and DBDC. The T category of GBC staging was more accurate at distinguishing OS in patients with CDC than the DBDC staging. Patients with T3 CDC and GBC showed a significant OS difference when using the T category for GBC staging, while those with T1-T2 CDC and GBC showed no significant difference. In contrast, the T category of DBDC staging did not show any significant OS difference between patients with T1-T2 CDC and DBDC or T3 CDC and DBDC. Patients with type 1 CDC had significantly better OS than those with combined types.
Conclusion
Unlike GBCs and DBDCs, CDCs exhibit distinct clinicopathological characteristics. The OS is better when the CDC confines within the CD, compared to when it extends beyond it. Therefore, we propose a new T category scheme (T1, confined to CD; T2, invaded beyond CD) for better classifying CDCs.
4.Study on the Necessity and Methodology for Enhancing Outpatient and Clinical Education in the Department of Radiology
Soo Buem CHO ; Jiwoon SEO ; Young Hwan KIM ; You Me KIM ; Dong Gyu NA ; Jieun ROH ; Kyung-Hyun DO ; Jung Hwan BAEK ; Hye Shin AHN ; Min Woo LEE ; Seunghyun LEE ; Seung Eun JUNG ; Woo Kyoung JEONG ; Hye Doo JEONG ; Bum Sang CHO ; Hwan Jun JAE ; Seon Hyeong CHOI ; Saebeom HUR ; Su Jin HONG ; Sung Il HWANG ; Auh Whan PARK ; Ji-hoon KIM
Journal of the Korean Society of Radiology 2025;86(1):199-200
5.Study on the Necessity and Methodology for Enhancing Outpatient and Clinical Education in the Department of Radiology
Soo Buem CHO ; Jiwoon SEO ; Young Hwan KIM ; You Me KIM ; Dong Gyu NA ; Jieun ROH ; Kyung-Hyun DO ; Jung Hwan BAEK ; Hye Shin AHN ; Min Woo LEE ; Seunghyun LEE ; Seung Eun JUNG ; Woo Kyoung JEONG ; Hye Doo JEONG ; Bum Sang CHO ; Hwan Jun JAE ; Seon Hyeong CHOI ; Saebeom HUR ; Su Jin HONG ; Sung Il HWANG ; Auh Whan PARK ; Ji-hoon KIM
Journal of the Korean Society of Radiology 2025;86(1):199-200
6.Stage Evaluation of Cystic Duct Cancer
Yeseul KIM ; You-Na SUNG ; Haesung JUNG ; Kyung Jin LEE ; Daegwang YOO ; Sun-Young JUN ; HyungJun CHO ; Shin HWANG ; Woohyung LEE ; Seung-Mo HONG
Cancer Research and Treatment 2025;57(2):528-538
Purpose:
Cystic duct cancers (CDCs) have been classified as extrahepatic bile duct cancers or gallbladder cancers (GBCs); however, it is unclear whether their clinical behavior is similar to that of distal extrahepatic bile duct cancers (DBDCs) or GBCs.
Materials and Methods:
T category of the CDCs was classified using current T category scheme of the GBCs and DBDCs, and clinicopathological factors were compared among 38 CDCs, 345 GBCs, and 349 DBDCs. We modified Nakata’s classifications (type 1, confined within cystic duct [CD]; combined types 2-4, extension beyond CD) and compared them.
Results:
No significant overall survival (OS) difference was observed between the patients with CDC, GBC, and DBDC. The T category of GBC staging was more accurate at distinguishing OS in patients with CDC than the DBDC staging. Patients with T3 CDC and GBC showed a significant OS difference when using the T category for GBC staging, while those with T1-T2 CDC and GBC showed no significant difference. In contrast, the T category of DBDC staging did not show any significant OS difference between patients with T1-T2 CDC and DBDC or T3 CDC and DBDC. Patients with type 1 CDC had significantly better OS than those with combined types.
Conclusion
Unlike GBCs and DBDCs, CDCs exhibit distinct clinicopathological characteristics. The OS is better when the CDC confines within the CD, compared to when it extends beyond it. Therefore, we propose a new T category scheme (T1, confined to CD; T2, invaded beyond CD) for better classifying CDCs.
7.Study on the Necessity and Methodology for Enhancing Outpatient and Clinical Education in the Department of Radiology
Soo Buem CHO ; Jiwoon SEO ; Young Hwan KIM ; You Me KIM ; Dong Gyu NA ; Jieun ROH ; Kyung-Hyun DO ; Jung Hwan BAEK ; Hye Shin AHN ; Min Woo LEE ; Seunghyun LEE ; Seung Eun JUNG ; Woo Kyoung JEONG ; Hye Doo JEONG ; Bum Sang CHO ; Hwan Jun JAE ; Seon Hyeong CHOI ; Saebeom HUR ; Su Jin HONG ; Sung Il HWANG ; Auh Whan PARK ; Ji-hoon KIM
Journal of the Korean Society of Radiology 2025;86(1):199-200
8.Retinal Tears in Fundus-obscuring Vitreous Hemorrhages of Unknown Cause: Risk Factors and Surgical Outcomes
Journal of Retina 2025;10(2):158-164
Purpose:
To identify factors associated with retinal tears in eyes presenting with fundus-obscuring vitreous hemorrhage (FOVH) of unknown cause and to evaluate surgical findings and visual outcomes following pars plana vitrectomy (PPV).
Methods:
This retrospective study included patients who underwent 23-gauge or 25-gauge PPV for acute-onset FOVH, defined as a dense vitreous hemorrhage obscuring both the posterior pole and peripheral retina across at least three quadrants with a best-corrected visual acuity (BCVA) of counting fingers or worse at presentation. Etiologies of FOVH were identified intraoperatively, and subsequent analyses focused on the prevalence, clinical characteristics, and surgical outcomes of eyes diagnosed with retinal tears.
Results:
Among the 8 9 eyes in cluded, retinal tears were the most common etiology (38.2%), followed by retinal vascular occlusion (27.0%), and polypoidal choroidal vasculopathy (13.5%). Eyes with retinal tears were significantly younger (57.2 vs. 67.9 years, p <0.001) and less likely to have diabetes (5.9 vs. 41.8%, p <0.001) compared with those without retinal tears. In a multivariate analysis, younger age (p < 0.001) and absence of diabetes (p = 0.007) were independent predictors of retinal tears. Among eyes with retinal tears, the mean duration from symptom onset to surgery was 9.2 days. Most eyes (67.6%) had a single tear, and in 79.4%, the largest tear was in the superior quadrant. No cases of macular-off retinal detachment or proliferative vitreoretinopathy were observed. At final follow-up, 82.4% of the eyes achieved a BCVA of 20/20, with no cases of reoperation.
Conclusions
Retinal tears are commonly identified intraoperatively in eyes presenting with FOVH, with younger age and absence of diabetes significantly associated with their presence. Despite delayed surgery, favorable anatomical and visual outcomes were achieved.Given the frequent localization of tears in the superior retina, careful peripheral inspection during vitrectomy is essential for detecting treatable pathology.
9.Deep Learning–based Estimation of Glomerular Filtration Rate from Macular Optical Coherence Tomography
Journal of Retina 2025;10(2):182-189
Purpose:
This study aimed to develop a deep learning regression model using macular optical coherence tomography (OCT) images to predict estimated glomerular filtration rate (eGFR).
Methods:
In this retrospective cross-sectional study, we analyzed data from patients who underwent preoperative evaluation for cataract surgery, including spectral-domain OCT (Spectralis; Heidelberg Engineering) images, blood test–derived eGFR, and ocular biometry.A dual-input regression model based on a modified ResNet-18 architecture was constructed to process simultaneously horizontal and vertical B-scan macular OCT images. The model’s predicted eGFR was further combined with patient age, sex, presence of diabetes and hypertension, and axial length using a Random Forest regression algorithm to create a hybrid model. Model performance was assessed using the root mean squared error (RMSE) and coefficient of determination (R2 ). Gradient-weighted regression activation mapping (GradRAM) was applied for visualization to assess the anatomical regions contributing to predictions.
Results:
A total of 101 eyes from 101 patients were included. The ResNet-18 model achieved an eGFR prediction accuracy with an R2of 0.89 and an RMSE of 4.23. The Random Forest hybrid model further improved predictive performance, achieving an R2 of 0.94 and an RMSE of 3.64. The mean absolute error (MAE) across the full cohort was 3.69 ± 2.08 mL/min/1.73 m2 . Among the 10 most accurately predicted cases, the MAE was as low as 0.42 ± 0.20 mL/min/1.73 m2 , while the 10 least accurate cases showed an MAE of 7.44 ± 0.92 mL/ min/1.73 m2 . Grad-RAM visualizations revealed predominant activation in the choroidal region of vertical OCT images.
Conclusions
This is the first study to demonstrate accurate prediction of renal function from macular OCT images using deep learning.The dual-input architecture and Grad-RAM visualization enabled high prediction performance and partial anatomical interpretability.These findings support the potential of OCT-based oculomics for systemic disease assessment.
10.A Case of Arteriovenous Malformation in the External Auditory Canal
Soo Jeong CHOI ; Juhyun LEE ; You-Na SUNG ; Gi Jung IM
Korean Journal of Otolaryngology - Head and Neck Surgery 2024;67(7):401-405
Benign vascular tumors are relatively common in the head and neck region, but are rarely found in the ear. Among vascular tumors, infantile hemangioma stands as the prevailing entity, characterized by a rapid initial proliferation of endothelial cells, succeeded by a gradual regression over the course of several years. In contrast, arteriovenous malformation (AVM) is a less common phenomenon, originating from peripheral vascular anomalies during embryogenesis, and it does not undergo spontaneous regression. Specifically, the occurrence of AVM within the external auditory canal are exceedingly uncommon. Here, we describe a case of a 49-year-old male patient who had a mass incidentally discovered in the external auditory canal, but refused initial treatment. He later returned as the mass enlarged. This case could have been clinically misdiagnosed as a hemangioma, but was ultimately diagnosed pathologically as an AVM.

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