1.The Brainstem Score on Diffusion-weighted Imaging before Mechanical Thrombectomy in Acute Basilar Artery Occlusion is a Reliable Predictor for Prognosis: A Comparative Study with Critical Area Perfusion Score on Perfusion MRI
Junho SEONG ; Kangwoo KIM ; Seungho LEE ; Yoonkyung LEE ; Byeol-A YOON ; Dae-Hyun KIM ; Jae-Kwan CHA
Journal of the Korean Neurological Association 2025;43(1):1-11
Background:
This study evaluated the use of brainstem score (BSS) on pre-procedural diffusion-weighted imaging (DWI) to predict outcomes after mechanical thrombectomy (MT) in acute basilar artery occlusion (ABAO) patients and compared its predictive effectiveness to the critical area perfusion score (CAPS) on perfusion magnetic resonance imaging (MRI) using RAPID.
Methods:
This study focused on ABAO patients who underwent MT after MRI at Dong-A University Hospital from 2013 to 2023. Ischemic lesion volume and DWI BSS were measured for all. For the group that underwent perfusion MRI using RAPID, CAPS were measured. The primary end point was a poor outcome at 90 days (modified Rankin scale [mRS], >2).
Results:
71 patients had ABAO and underwent MT after MRI. The poor outcome group (66.2%) had significantly larger ischemic lesion volume and higher DWI BSS compared with the good outcome group. In the multiple logistic regression analysis, DWI BSS (odds ratio, 8.27; 95% confidence interval, 1.93-35.50; p<0.01) was an independent predictor of poor outcomes. In 26 patients, CAPS was measured on perfusion MRI. In this subgroup, poor outcome group (50.0%) had higher DWI BSS and CAPS than the good outcome group. In the multiple logistic regression analysis, DWI BSS remained a valid independent predictor for predicting outcomes, but CAPS did not function as an independent predictor.
Conclusion
In this study, the DWI BSS before MT in ABAO patients emerged as a useful imaging marker for predicting post-procedural outcomes. Its predictive ability is not only comparable to but even superior to CAPS on perfusion MRI.
2.The Brainstem Score on Diffusion-weighted Imaging before Mechanical Thrombectomy in Acute Basilar Artery Occlusion is a Reliable Predictor for Prognosis: A Comparative Study with Critical Area Perfusion Score on Perfusion MRI
Junho SEONG ; Kangwoo KIM ; Seungho LEE ; Yoonkyung LEE ; Byeol-A YOON ; Dae-Hyun KIM ; Jae-Kwan CHA
Journal of the Korean Neurological Association 2025;43(1):1-11
Background:
This study evaluated the use of brainstem score (BSS) on pre-procedural diffusion-weighted imaging (DWI) to predict outcomes after mechanical thrombectomy (MT) in acute basilar artery occlusion (ABAO) patients and compared its predictive effectiveness to the critical area perfusion score (CAPS) on perfusion magnetic resonance imaging (MRI) using RAPID.
Methods:
This study focused on ABAO patients who underwent MT after MRI at Dong-A University Hospital from 2013 to 2023. Ischemic lesion volume and DWI BSS were measured for all. For the group that underwent perfusion MRI using RAPID, CAPS were measured. The primary end point was a poor outcome at 90 days (modified Rankin scale [mRS], >2).
Results:
71 patients had ABAO and underwent MT after MRI. The poor outcome group (66.2%) had significantly larger ischemic lesion volume and higher DWI BSS compared with the good outcome group. In the multiple logistic regression analysis, DWI BSS (odds ratio, 8.27; 95% confidence interval, 1.93-35.50; p<0.01) was an independent predictor of poor outcomes. In 26 patients, CAPS was measured on perfusion MRI. In this subgroup, poor outcome group (50.0%) had higher DWI BSS and CAPS than the good outcome group. In the multiple logistic regression analysis, DWI BSS remained a valid independent predictor for predicting outcomes, but CAPS did not function as an independent predictor.
Conclusion
In this study, the DWI BSS before MT in ABAO patients emerged as a useful imaging marker for predicting post-procedural outcomes. Its predictive ability is not only comparable to but even superior to CAPS on perfusion MRI.
3.The Brainstem Score on Diffusion-weighted Imaging before Mechanical Thrombectomy in Acute Basilar Artery Occlusion is a Reliable Predictor for Prognosis: A Comparative Study with Critical Area Perfusion Score on Perfusion MRI
Junho SEONG ; Kangwoo KIM ; Seungho LEE ; Yoonkyung LEE ; Byeol-A YOON ; Dae-Hyun KIM ; Jae-Kwan CHA
Journal of the Korean Neurological Association 2025;43(1):1-11
Background:
This study evaluated the use of brainstem score (BSS) on pre-procedural diffusion-weighted imaging (DWI) to predict outcomes after mechanical thrombectomy (MT) in acute basilar artery occlusion (ABAO) patients and compared its predictive effectiveness to the critical area perfusion score (CAPS) on perfusion magnetic resonance imaging (MRI) using RAPID.
Methods:
This study focused on ABAO patients who underwent MT after MRI at Dong-A University Hospital from 2013 to 2023. Ischemic lesion volume and DWI BSS were measured for all. For the group that underwent perfusion MRI using RAPID, CAPS were measured. The primary end point was a poor outcome at 90 days (modified Rankin scale [mRS], >2).
Results:
71 patients had ABAO and underwent MT after MRI. The poor outcome group (66.2%) had significantly larger ischemic lesion volume and higher DWI BSS compared with the good outcome group. In the multiple logistic regression analysis, DWI BSS (odds ratio, 8.27; 95% confidence interval, 1.93-35.50; p<0.01) was an independent predictor of poor outcomes. In 26 patients, CAPS was measured on perfusion MRI. In this subgroup, poor outcome group (50.0%) had higher DWI BSS and CAPS than the good outcome group. In the multiple logistic regression analysis, DWI BSS remained a valid independent predictor for predicting outcomes, but CAPS did not function as an independent predictor.
Conclusion
In this study, the DWI BSS before MT in ABAO patients emerged as a useful imaging marker for predicting post-procedural outcomes. Its predictive ability is not only comparable to but even superior to CAPS on perfusion MRI.
4.Perioperative outcomes of sinusoidal obstruction syndrome in patients undergoing liver resection for colorectal metastases after neoadjuvant chemotherapy:a retrospective cohort research
Yoonkyung WOO ; Ho Joong CHOI ; Sung Hak LEE ; Yoonyoung CHOI ; Sung Eun PARK ; Tae Ho HONG ; Young Kyoung YOU
Annals of Surgical Treatment and Research 2024;107(6):346-353
Purpose:
We investigated the factors that affect the occurrence of sinusoidal obstruction syndrome (SOS) and the effect of SOS on the patient’s perioperative outcomes through histological review of liver resection specimens from patients who underwent chemotherapy.
Methods:
From December 2007 to December 2020, liver specimens from patients who underwent liver resection for colorectal liver metastasis after neoadjuvant chemotherapy were analyzed regarding liver damage in the nontumorous lesion. Through pathological review, patients with grade 1–3 sinusoidal dilatation were categorized into the SOS (+) group, compared to a control group (grade 0, SOS [–]).
Results:
Of 286 patients, 175 were included. Preoperative factors were similar between the groups. Although not statistically significant, the SOS (+) group had a shorter chemotherapy-free interval before resection (7.96 weeks vs. 10.0 weeks, P = 0.069). The SOS (+) group had higher intraoperative blood loss (889.1 ± 1,126.6 mL vs. 555.3 ± 566.7 mL, P = 0.012) and transfusion rates (46.6% vs. 25.3%, P = 0.003). SOS correlated with increased liver surgery-specific complications (40.9% vs. 26.4, P = 0.043). Patients with SOS experienced adverse effects on intrahepatic recurrent-free survival and overall survival (5-year survival, 46.0% vs. 33.9%; P = 0.014).
Conclusion
SOS development during liver surgery is associated with increased intraoperative blood loss, transfusion volume, and liver surgery-specific complications and has a higher risk of early recurrence and decreased overall survival.Thus, it is crucial to exercise caution during liver surgery in these patients.
5.Perioperative outcomes of sinusoidal obstruction syndrome in patients undergoing liver resection for colorectal metastases after neoadjuvant chemotherapy:a retrospective cohort research
Yoonkyung WOO ; Ho Joong CHOI ; Sung Hak LEE ; Yoonyoung CHOI ; Sung Eun PARK ; Tae Ho HONG ; Young Kyoung YOU
Annals of Surgical Treatment and Research 2024;107(6):346-353
Purpose:
We investigated the factors that affect the occurrence of sinusoidal obstruction syndrome (SOS) and the effect of SOS on the patient’s perioperative outcomes through histological review of liver resection specimens from patients who underwent chemotherapy.
Methods:
From December 2007 to December 2020, liver specimens from patients who underwent liver resection for colorectal liver metastasis after neoadjuvant chemotherapy were analyzed regarding liver damage in the nontumorous lesion. Through pathological review, patients with grade 1–3 sinusoidal dilatation were categorized into the SOS (+) group, compared to a control group (grade 0, SOS [–]).
Results:
Of 286 patients, 175 were included. Preoperative factors were similar between the groups. Although not statistically significant, the SOS (+) group had a shorter chemotherapy-free interval before resection (7.96 weeks vs. 10.0 weeks, P = 0.069). The SOS (+) group had higher intraoperative blood loss (889.1 ± 1,126.6 mL vs. 555.3 ± 566.7 mL, P = 0.012) and transfusion rates (46.6% vs. 25.3%, P = 0.003). SOS correlated with increased liver surgery-specific complications (40.9% vs. 26.4, P = 0.043). Patients with SOS experienced adverse effects on intrahepatic recurrent-free survival and overall survival (5-year survival, 46.0% vs. 33.9%; P = 0.014).
Conclusion
SOS development during liver surgery is associated with increased intraoperative blood loss, transfusion volume, and liver surgery-specific complications and has a higher risk of early recurrence and decreased overall survival.Thus, it is crucial to exercise caution during liver surgery in these patients.
6.Perioperative outcomes of sinusoidal obstruction syndrome in patients undergoing liver resection for colorectal metastases after neoadjuvant chemotherapy:a retrospective cohort research
Yoonkyung WOO ; Ho Joong CHOI ; Sung Hak LEE ; Yoonyoung CHOI ; Sung Eun PARK ; Tae Ho HONG ; Young Kyoung YOU
Annals of Surgical Treatment and Research 2024;107(6):346-353
Purpose:
We investigated the factors that affect the occurrence of sinusoidal obstruction syndrome (SOS) and the effect of SOS on the patient’s perioperative outcomes through histological review of liver resection specimens from patients who underwent chemotherapy.
Methods:
From December 2007 to December 2020, liver specimens from patients who underwent liver resection for colorectal liver metastasis after neoadjuvant chemotherapy were analyzed regarding liver damage in the nontumorous lesion. Through pathological review, patients with grade 1–3 sinusoidal dilatation were categorized into the SOS (+) group, compared to a control group (grade 0, SOS [–]).
Results:
Of 286 patients, 175 were included. Preoperative factors were similar between the groups. Although not statistically significant, the SOS (+) group had a shorter chemotherapy-free interval before resection (7.96 weeks vs. 10.0 weeks, P = 0.069). The SOS (+) group had higher intraoperative blood loss (889.1 ± 1,126.6 mL vs. 555.3 ± 566.7 mL, P = 0.012) and transfusion rates (46.6% vs. 25.3%, P = 0.003). SOS correlated with increased liver surgery-specific complications (40.9% vs. 26.4, P = 0.043). Patients with SOS experienced adverse effects on intrahepatic recurrent-free survival and overall survival (5-year survival, 46.0% vs. 33.9%; P = 0.014).
Conclusion
SOS development during liver surgery is associated with increased intraoperative blood loss, transfusion volume, and liver surgery-specific complications and has a higher risk of early recurrence and decreased overall survival.Thus, it is crucial to exercise caution during liver surgery in these patients.
7.Changes in Corneal Thickness in Congenital Glaucoma, Using Anterior Segment Optical Coherence Tomography
Chaeyeon LEE ; Eun Jung LEE ; Yoonkyung JANG ; Jong Chul HAN ; Chang Won KEE
Journal of the Korean Ophthalmological Society 2022;63(8):692-699
Purpose:
We examined corneal thickness, particularly morphological changes in the limbus, as the intraocular pressure increased in patients with congenital glaucoma.
Methods:
We retrospectively studied 31 children (47 eyes) with congenital glaucoma and 12 controls (12 eyes). We used anterior segment tomography to measure corneal thicknesses at the center, the midpoint of the 2-5 mm pericentral zone, the corneo-limbal junction, and the scleral spurs on the nasal and temporal sides. The peripheral central corneal thickness ratios were calculated and analyzed using a generalized estimation equation.
Results:
The cornea was significantly thinner in the glaucoma than in the control group. The difference was more prominent in the periphery than the center. Associated with such peripheral thinning, the corneal thickness ratios at the corneal-limbal junction and the center differed significantly between the two groups.
Conclusions
In congenital glaucoma patients, the cornea is generally thinner than that of the controls, particularly at the corneo-limbal junction, suggesting that the limbus is biomechanically susceptible to deformation by intraocular pressure.
8.Factors Influencing Prognosis of Traumatized Tooth in Primary Tooth Intrusion
Yongkwon CHAE ; Yoonkyung HAN ; Okhyung NAM ; Misun KIM ; Hyoseol LEE ; Kwangchul KIM ; Sungchul CHOI
Journal of Korean Academy of Pediatric Dentistry 2019;46(1):29-37
The purpose of this study was to investigate the characteristics of intrusion in primary dentition and to evaluate factors influencing complications of primary and permanent dentition during long-term follow-up period.61 patients (84 teeth) were selected in this study. Medical records of 61 patients were reviewed and age, gender, cause of injury, site of injury, severity of traumatic injury, other injuries associated with trauma, treatment method, and complications of primary and permanent dentition were examined. Collected data were statistically evaluated using Chi-square test and Fisher's exact test.Intrusion in primary anterior teeth was predominant in boys over girls and fall was the most common cause of trauma. It was most common at home and occurred most in the primary maxillary central incisors. Severity had an effect on the incidence of sequelae in permanent successors (p = 0.014). The incidence of complications was significantly lower in patients with soft tissue injuries than in patients with other periodontal injuries (p = 0.000).
Dentition, Permanent
;
Female
;
Follow-Up Studies
;
Humans
;
Incidence
;
Incisor
;
Medical Records
;
Methods
;
Prognosis
;
Soft Tissue Injuries
;
Tooth Abnormalities
;
Tooth Injuries
;
Tooth
;
Tooth, Deciduous
9.A Patient with Cerebral Infarction and Renal Infarction Accompanying Complex Aortic Plaque of Descending Thoracic Aorta
Chan Young LEE ; Min Young CHUN ; Seung Ah LEE ; Eun Hye LEE ; Sue Hyun LEE ; Yoonkyung CHANG ; Yong Jae KIM ; Dong Ryeol RYU ; Tae Jin SONG
Journal of the Korean Neurological Association 2019;37(2):209-211
No abstract available.
Aorta, Thoracic
;
Cerebral Infarction
;
Humans
;
Infarction
10.Spontaneous Repetitive Constriction and Dilatation of a Unilateral Pupil in a Brain Death Patient
Min Young CHUN ; Jin PARK ; Seung Yeop LEE ; Chan Young LEE ; Seung Ah LEE ; Eun Hye LEE ; Sue Hyun LEE ; Yoonkyung CHANG ; Kee Duk PARK ; Tae Jin SONG
Journal of the Korean Neurological Association 2019;37(2):182-185
In brain death state, bilateral pupil light reflexes are disappeared, and pupils are fixed with dilated. However, spontaneous movements such as ocular microtremor or bilateral cyclical constriction-dilatation of pupils have been rarely reported in brain death patients. We present a brain death patient whose right pupil displayed spontaneously repetitive constriction and dilatation regardless of external stimuli such as light and pain. Early recognition of this phenomenon may prohibit the delay in the diagnosis of brain death and organ transplantation.
Brain Death
;
Brain
;
Coma
;
Constriction
;
Diagnosis
;
Dilatation
;
Humans
;
Organ Transplantation
;
Pupil
;
Reflex
;
Transplants

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