1.Significant miRNAs as Potential Biomarkers to Differentiate Moyamoya Disease From Intracranial Atherosclerotic Disease
Hyesun LEE ; Mina HWANG ; Hyuk Sung KWON ; Young Seo KIM ; Hyun Young KIM ; Soo JEONG ; Kyung Chul NOH ; Hye-Yeon CHOI ; Ho Geol WOO ; Sung Hyuk HEO ; Seong-Ho KOH ; Dae-Il CHANG
Journal of Clinical Neurology 2025;21(2):146-149
2.Significant miRNAs as Potential Biomarkers to Differentiate Moyamoya Disease From Intracranial Atherosclerotic Disease
Hyesun LEE ; Mina HWANG ; Hyuk Sung KWON ; Young Seo KIM ; Hyun Young KIM ; Soo JEONG ; Kyung Chul NOH ; Hye-Yeon CHOI ; Ho Geol WOO ; Sung Hyuk HEO ; Seong-Ho KOH ; Dae-Il CHANG
Journal of Clinical Neurology 2025;21(2):146-149
3.Significant miRNAs as Potential Biomarkers to Differentiate Moyamoya Disease From Intracranial Atherosclerotic Disease
Hyesun LEE ; Mina HWANG ; Hyuk Sung KWON ; Young Seo KIM ; Hyun Young KIM ; Soo JEONG ; Kyung Chul NOH ; Hye-Yeon CHOI ; Ho Geol WOO ; Sung Hyuk HEO ; Seong-Ho KOH ; Dae-Il CHANG
Journal of Clinical Neurology 2025;21(2):146-149
4.Scoring System to Predict Malignancy for MRI-Detected Lesions in Breast Cancer Patients: Diagnostic Performance and Effect on Second-Look Ultrasonography
Young Geol KWON ; Ah Young PARK
Journal of the Korean Radiological Society 2020;81(2):379-394
Purpose:
To design a scoring system to predict malignancy of additional MRI-detected lesions in breast cancer patients.
Materials and Methods:
Eighty-six lesions (64 benign and 22 malignant) detected on preoperative MRI of 68 breast cancer patients were retrospectively included. The clinico-radiologic features were correlated with the histopathologic results using the Student's t-test, Fisher's exact test, and logistic regression analysis. The scoring system was designed based on the significant predictive features of malignancy, and its diagnostic performance was compared with that of the Breast Imaging-Reporting and Data System (BI-RADS) category.
Results:
Lesion size ≥ 8 mm (p < 0.001), location in the same quadrant as the primary cancer (p = 0.005), delayed plateau kinetics (p = 0.010), T2 isointense (p = 0.034) and hypointense (p = 0.024) signals, and irregular mass shape (p = 0.028) were associated with malignancy. In comparison with the BI-RADS category, the scoring system based on these features with suspicious non-mass internal enhancement increased the diagnostic performance (area under the receiver operating characteristic curve: 0.918 vs. 0.727) and detected three false-negative cases. With this scoring system, 22 second-look ultrasound examinations (22/66, 33.3%) could have been avoided.
Conclusion
The scoring system based on the lesion size, location relative to the primary cancer, delayed kinetic features, T2 signal intensity, mass shape, and non-mass internal enhancement can provide a more accurate approach to evaluate MRI-detected lesions in breast cancer patients.
5.Scoring System to Predict Malignancy for MRI-Detected Lesions in Breast Cancer Patients: Diagnostic Performance and Effect on Second-Look Ultrasonography
Young Geol KWON ; Ah Young PARK
Journal of the Korean Radiological Society 2020;81(2):379-394
Purpose:
To design a scoring system to predict malignancy of additional MRI-detected lesions in breast cancer patients.
Materials and Methods:
Eighty-six lesions (64 benign and 22 malignant) detected on preoperative MRI of 68 breast cancer patients were retrospectively included. The clinico-radiologic features were correlated with the histopathologic results using the Student's t-test, Fisher's exact test, and logistic regression analysis. The scoring system was designed based on the significant predictive features of malignancy, and its diagnostic performance was compared with that of the Breast Imaging-Reporting and Data System (BI-RADS) category.
Results:
Lesion size ≥ 8 mm (p < 0.001), location in the same quadrant as the primary cancer (p = 0.005), delayed plateau kinetics (p = 0.010), T2 isointense (p = 0.034) and hypointense (p = 0.024) signals, and irregular mass shape (p = 0.028) were associated with malignancy. In comparison with the BI-RADS category, the scoring system based on these features with suspicious non-mass internal enhancement increased the diagnostic performance (area under the receiver operating characteristic curve: 0.918 vs. 0.727) and detected three false-negative cases. With this scoring system, 22 second-look ultrasound examinations (22/66, 33.3%) could have been avoided.
Conclusion
The scoring system based on the lesion size, location relative to the primary cancer, delayed kinetic features, T2 signal intensity, mass shape, and non-mass internal enhancement can provide a more accurate approach to evaluate MRI-detected lesions in breast cancer patients.
6.Effect of end-to-side inverted mattress pancreaticojejunostomy following central pancreatectomy on the prevention of pancreatic fistula.
Young Yeon CHOI ; Sang Geol KIM ; Yun Jin HWANG ; Hyung Jun KWON
Annals of Surgical Treatment and Research 2017;93(5):246-251
PURPOSE: Central pancreatectomy (CP) may be indicated for the treatment of benign or low-grade malignant tumor in the neck and proximal body of the pancreas. Pancreatic fistula is one of the most common complications after CP. In this study, we suggested an inverted mattress pancreaticojejunostomy (IM-PJ) technique to decrease the risk of pancreatic fistula. METHODS: Between 2010 and 2015, CP was performed with IM-PJ for 10 consecutive patients with a benign or low-grade malignant tumor in the neck and proximal body of the pancreas. All clinical and pathological data were analyzed retrospectively. RESULTS: Median age was 56.4 years (range, 17–75 years). Median surgery duration was 286 minutes (range, 205–410 minutes). In all cases, the distal stump was reconstructed using the IM-PJ method. Median duration of hospital stay was 23.8 days (range, 9–53 days). No patient mortality occurred. Pancreatic fistula developed in 9 cases (90%); however, all fistulas were grade A and resolved without surgical or radiological intervention. Nine patients remain well with no recurrence or new endocrine or exocrine dysfunction. CONCLUSION: Our results demonstrate that the outcomes of CP with IM-PJ are reasonable for prevention of pancreatic fistula following CP.
Fistula
;
Humans
;
Length of Stay
;
Methods
;
Mortality
;
Neck
;
Pancreas
;
Pancreatectomy*
;
Pancreatic Fistula*
;
Pancreaticojejunostomy*
;
Recurrence
;
Retrospective Studies
7.Late Hepatic Venous Outflow Obstruction Following Inferior Vena Cava Stenting in Patient with Deceased Donor Liver Transplantation Using Modified Piggyback Technique.
Jae Min CHUN ; Heontak HA ; Young Yeon CHOI ; Hyung Jun KWON ; Sang Geol KIM ; Yoon Jin HWANG ; Hunkyu RYEOM ; Young Seok HAN
The Journal of the Korean Society for Transplantation 2016;30(2):89-93
Following liver transplantation, a few reports have documented hepatic venous outflow obstruction (HVOO) after inferior vena cava (IVC) stenting for the treatment of IVC stenosis. However, HVOO occurred early after IVC stenting and was mostly associated with living donor liver transplantation. Here, we report a case of HVOO that occurred 31 months after IVC stenting in a man who received deceased donor liver transplantation (DDLT) using a modified piggyback (PB) technique. The cause of HVOO was unclear, but one possible explanation is that the balloon-expandable IVC stent might have compressed the IVC chamber on the donor liver side, which would have changed the outflow hemodynamics, resulting in intimal hyperplasia. Therefore, simultaneous hepatic venous stenting with IVC stent placement could help prevent HVOO in patients receiving DDLT with the modified PB technique.
Budd-Chiari Syndrome*
;
Constriction, Pathologic
;
Hemodynamics
;
Humans
;
Hyperplasia
;
Liver Transplantation*
;
Liver*
;
Living Donors
;
Stents*
;
Tissue Donors*
;
Vena Cava, Inferior*
8.Outcomes and recurrence pattern after non-anatomic liver resection for solitary hepatocellular carcinomas.
Sung Hoon CHO ; Jae Min CHUN ; Hyung Jun KWON ; Young Seok HAN ; Sang Geol KIM ; Yoon Jin HWANG
Korean Journal of Hepato-Biliary-Pancreatic Surgery 2016;20(1):1-7
BACKGROUNDS/AIMS: Anatomic resection (AR) is preferred for eradicating portal tributaries in patients with hepatocellular carcinoma (HCC). However, the extent of resection is influenced by underlying liver disease and tumor location. We compared the surgical outcomes and recurrence pattern between non-anatomic resection (NR) and AR. METHODS: From March 2009 to February 2012, 184 patients underwent surgical resection for HCC. Among these, 79 patients who were primarily treated for a single tumor without rupture or macroscopic vascular invasion were enrolled. The patients were divided into 2 groups based on the extent of resection: AR (n=31) or NR (n=48). We compared the clinical characteristics, overall survival, disease-free survival, pattern of recurrence, and biochemical liver functions during the perioperative period between the two groups. RESULTS: The extent of resection had no significant effect on overall or disease-free survival rates. The overall 1- and 3-year survival rates were 97% and 82% in the AR group, and 96% and 89% in the NR group, respectively (p=0.49). In addition, the respective 1- and 3-year disease-free survival rates for the AR and NR groups were 84% and 63%, and 85% and 65%, respectively (p=0.94). On the other hand, the presence of hepatic cirrhosis and a tumor size of >5 cm were significant risk factors for recurrence according to multivariate analysis (p<0.001 and p=0.003, respectively). The frequency of early recurrence, the first site of recurrence, and the pattern of intrahepatic recurrence were similar between the 2 groups (p=0.419, p=0.210, and p=0.734, respectively); in addition, the frequency of marginal recurrence did not differ between the 2 groups (1 patient in the AR group and 2 in the NR group). The NR group showed better postoperative liver function than the AR group. CONCLUSIONS: Non-anatomic liver resection can be a safe and efficient treatment for patients with a solitary HCC without rupture or gross vascular invasion.
Carcinoma, Hepatocellular*
;
Disease-Free Survival
;
Hand
;
Humans
;
Liver Cirrhosis
;
Liver Diseases
;
Liver*
;
Multivariate Analysis
;
Perioperative Period
;
Recurrence*
;
Risk Factors
;
Rupture
;
Survival Rate
9.A Fatal Case of Full-Blown Neuro-Behcet Disease.
Boo Suk NA ; Young Nam KWON ; Soo Jin SONG ; Jong Min SONG ; Ho Geol WOO ; Dokyung LEE ; Tae Beom AHN
Korean Journal of Clinical Neurophysiology 2015;17(1):28-30
We reported a 48-year-old man with Behcet disease, who presented with right hemiparesis. His first brain MRI showed multiple enhanced lesions. During the recovery, he had an episode of left 6th nerve palsy without new lesions in a follow-up MRI. Third episode was cervical myelitis, resulting in respiratory difficulty and quadriplegia without any reflexes. The myelitis was not responsive to immunotherapy. He died of respiratory failure complicated with pneumonia. This is a rare case of full-blown neuro-Behcet disease.
Abducens Nerve Diseases
;
Behcet Syndrome
;
Brain
;
Brain Stem
;
Follow-Up Studies
;
Humans
;
Immunotherapy
;
Magnetic Resonance Imaging
;
Middle Aged
;
Myelitis
;
Paresis
;
Pneumonia
;
Quadriplegia
;
Reflex
;
Respiratory Insufficiency
;
Spinal Cord
10.Distal pancreatectomy with celiac axis resection for pancreatic body and tail cancer invading celiac axis.
Hyemin HAM ; Sang Geol KIM ; Hyung Jun KWON ; Heontak HA ; Young Yeon CHOI
Annals of Surgical Treatment and Research 2015;89(4):167-175
PURPOSE: Pancreatic body/tail cancer often involves the celiac axis (CA) and it is regarded as an unresectable disease. To treat the disease, we employed distal pancreatectomy with en bloc celiac axis resection (DP-CAR) and reviewed our experiences. METHODS: We performed DP-CAR for seven patients with pancreatic body/tail cancer involving the CA. The indications of DP-CAR initially included tumors with definite invasion of CA and were later expanded to include borderline resectable disease. To determine the efficacy of DP-CAR, the clinico-pathological data of patients who underwent DP-CAR were compared to both distal pancreatectomy (DP) group and no resection (NR) group. RESULTS: The R0 resection rate was 71.4% and was not statistically different compared to DP group. The operative time (P = 0.018) and length of hospital stay (P = 0.022) were significantly longer in DP-CAR group but no significant difference was found in incidence of the postoperative pancreatic fistula compared to DP group. In DP-CAR group, focal hepatic infarction and transient hepatopathy occurred in 1 patient and 3 patients, respectively. No mortality occurred in DP-CAR group. The median survival time (MST) was not statistically different compared to DP group. However, the MST of DP-CAR group was significantly longer than that of NR group (P < 0.001). CONCLUSION: In our experience, DP-CAR was safe and offered high R0 resection rate for patients with pancreatic body/tail cancer with involvement of CA. The effect on survival of DP-CAR is comparable to DP and better than that of NR. However, the benefits need to be verified by further studies in the future.
Axis, Cervical Vertebra*
;
Celiac Artery
;
Humans
;
Incidence
;
Infarction
;
Length of Stay
;
Mortality
;
Operative Time
;
Pancreatectomy*
;
Pancreatic Fistula
;
Pancreatic Neoplasms
;
Tail*

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