1.Intraoperative Visual Evoked Potential Monitoring in Endoscopic Endonasal Surgery for Nonpituitary Adenoma Suprasellar Tumors
Young Nam KWON ; Hwa Reung LEE ; Myung Jae LEE ; Young Ung KIM ; Seung Woo KIM ; Ha Young SHIN ; Sung-Min KIM ; Ju Hyung MOON ; Jong Hee CHANG ; Eui Hyun KIM
Journal of Clinical Neurology 2026;22(2):221-228
Background:
and Purpose Intraoperative visual evoked potential (VEP) monitoring has been studied mainly in pituitary adenoma, while its role in nonpituitary suprasellar tumors has remained unclear. This study evaluated the predictive usefulness of intraoperative VEP monitoring during endoscopic endonasal surgery (EES) and aimed to identify optimal alarm criteria for visual outcomes.
Methods:
We retrospectively analyzed a cohort of 87 patients who underwent EES with intraoperative VEP monitoring between April 2021 and September 2023. Visual outcomes were evaluated preoperatively and at short-term (≤3 months) and long-term (12 months) followups, with visual deterioration at these time points defined as worsening of either visual acuity or the visual field. Reductions in the VEP amplitude were quantified using both the maximum intraoperative decrease and the final amplitude after recovery. Receiver operating characteristic (ROC) curve analyses were performed to identify the optimal alarm thresholds, and the sensitivity, specificity, positive predictive value, and negative predictive value were calculated for short-term and long-term visual deteriorations.
Results:
Short-term and long-term visual deteriorations were detected in 12 (9.2%) and 5 (3.8%) of the 130 analyzed eyes, respectively. ROC curve analyses identified ≥40% and ≥30% reductions in the N75–P100 amplitude as optimal alarm criteria for short-term and long-term visual deteriorations, respectively. A 30% reduction without intraoperative recovery demonstrated markedly higher sensitivity than the conventional 50% alarm threshold for short-term (58.3% vs. 33.3%) and long-term (80.0% vs. 20.0%) outcomes, while maintaining acceptable specificity (82.2% and 80.8%, respectively).
Conclusions
A 30% reduction in amplitude represents a more-sensitive and clinically relevant alarm threshold than a 50% reduction for intraoperative VEP monitoring during EES for nonpituitary suprasellar tumors. Incorporating both the magnitude and recovery pattern of VEP amplitude changes may improve the accuracy of predictions of long-term visual deterioration. However, the potential for false positives warrants cautious interpretation, and further studies are needed to validate the impact of intraoperative VEP monitoring on visual outcomes.
2.Effect of Intercostal Nerve Coaptation on Postoperative Pain in Implant-Based Breast Reconstruction: A Double-Blind, Randomized Controlled Pilot Study
Ji-Young KIM ; Jeong Hyun HA ; Ung Sik JIN
Journal of Breast Cancer 2025;28(2):108-118
Purpose:
Patients undergoing breast surgery may experience chronic postoperative pain in the breasts, upper extremities, and axillary regions, and no established methods for preventing this pain are available at present. This study aimed to investigate whether coaptation of the transected intercostal nerve can prevent the development of neuropathic and chronic breast pain after mastectomy in implant-based breast reconstruction.
Methods:
A prospective, double-blind, randomized controlled trial was conducted by dividing patients who underwent implant-based breast reconstruction after mastectomy into a control group without nerve coaptation and an experimental group with nerve coaptation.Patient clinical information was collected, and a survey using the pain and quality of life scale was conducted at 6 and 12 months after surgery.
Results:
Fifteen patients completed the study, including seven in the control group and eight in the experimental group. The two groups showed no significant differences in terms of clinical factors. The experimental group exhibited lower Short-Form McGill Pain Questionnaire scores than the control group at 6 and 12 months postoperatively, with a statistically significant difference at 6 months. Numerical Rating Scale and Present Pain Intensity scores for both groups were in the “no to mild” range throughout the study period, with no statistically significant differences between the groups. Although the difference in the BREAST-Q™ results did not reach statistical significance, the experimental group showed an improvement in the quality of life.
Conclusion
Intercostal nerve coaptation after mastectomy in implant-based breast reconstruction may facilitate initial nerve recovery. Although trial results are needed to fully determine the clinical impact, our findings support the ongoing scientific and clinical efforts to use this technique.
3.Effect of Intercostal Nerve Coaptation on Postoperative Pain in Implant-Based Breast Reconstruction: A Double-Blind, Randomized Controlled Pilot Study
Ji-Young KIM ; Jeong Hyun HA ; Ung Sik JIN
Journal of Breast Cancer 2025;28(2):108-118
Purpose:
Patients undergoing breast surgery may experience chronic postoperative pain in the breasts, upper extremities, and axillary regions, and no established methods for preventing this pain are available at present. This study aimed to investigate whether coaptation of the transected intercostal nerve can prevent the development of neuropathic and chronic breast pain after mastectomy in implant-based breast reconstruction.
Methods:
A prospective, double-blind, randomized controlled trial was conducted by dividing patients who underwent implant-based breast reconstruction after mastectomy into a control group without nerve coaptation and an experimental group with nerve coaptation.Patient clinical information was collected, and a survey using the pain and quality of life scale was conducted at 6 and 12 months after surgery.
Results:
Fifteen patients completed the study, including seven in the control group and eight in the experimental group. The two groups showed no significant differences in terms of clinical factors. The experimental group exhibited lower Short-Form McGill Pain Questionnaire scores than the control group at 6 and 12 months postoperatively, with a statistically significant difference at 6 months. Numerical Rating Scale and Present Pain Intensity scores for both groups were in the “no to mild” range throughout the study period, with no statistically significant differences between the groups. Although the difference in the BREAST-Q™ results did not reach statistical significance, the experimental group showed an improvement in the quality of life.
Conclusion
Intercostal nerve coaptation after mastectomy in implant-based breast reconstruction may facilitate initial nerve recovery. Although trial results are needed to fully determine the clinical impact, our findings support the ongoing scientific and clinical efforts to use this technique.
4.Effect of Intercostal Nerve Coaptation on Postoperative Pain in Implant-Based Breast Reconstruction: A Double-Blind, Randomized Controlled Pilot Study
Ji-Young KIM ; Jeong Hyun HA ; Ung Sik JIN
Journal of Breast Cancer 2025;28(2):108-118
Purpose:
Patients undergoing breast surgery may experience chronic postoperative pain in the breasts, upper extremities, and axillary regions, and no established methods for preventing this pain are available at present. This study aimed to investigate whether coaptation of the transected intercostal nerve can prevent the development of neuropathic and chronic breast pain after mastectomy in implant-based breast reconstruction.
Methods:
A prospective, double-blind, randomized controlled trial was conducted by dividing patients who underwent implant-based breast reconstruction after mastectomy into a control group without nerve coaptation and an experimental group with nerve coaptation.Patient clinical information was collected, and a survey using the pain and quality of life scale was conducted at 6 and 12 months after surgery.
Results:
Fifteen patients completed the study, including seven in the control group and eight in the experimental group. The two groups showed no significant differences in terms of clinical factors. The experimental group exhibited lower Short-Form McGill Pain Questionnaire scores than the control group at 6 and 12 months postoperatively, with a statistically significant difference at 6 months. Numerical Rating Scale and Present Pain Intensity scores for both groups were in the “no to mild” range throughout the study period, with no statistically significant differences between the groups. Although the difference in the BREAST-Q™ results did not reach statistical significance, the experimental group showed an improvement in the quality of life.
Conclusion
Intercostal nerve coaptation after mastectomy in implant-based breast reconstruction may facilitate initial nerve recovery. Although trial results are needed to fully determine the clinical impact, our findings support the ongoing scientific and clinical efforts to use this technique.
5.Antidepressant Discontinuation Syndrome
Se Hyun KIM ; Yong Sik KIM ; Ung Gu KANG
Journal of Korean Neuropsychiatric Association 2024;63(2):104-115
Since selective serotonin reuptake inhibitors were introduced in clinical practice in the 1990s, antidepressant prescriptions have steadily increased. In addition to the prescriptions by psychiatrists, antidepressant prescriptions by non-specialists have also increased. An advanced understanding of the pharmacological and clinical characteristics of antidepressants is essential to improving the treatment response of depressive disorders and the quality of life of patients. Antidepressant withdrawal or discontinuation syndrome can frequently occur if antidepressant maintenance is discontinued without a pre-planned clinical strategy. Nevertheless, it is often unrecognized or mistaken for other clinical situations. This causes patient distress and ultimately reduces long-term treatment compliance. Inappropriate therapeutic decisions can be made if clinicians do not recognize antidepressant discontinuation syndrome. Antidepressant withdrawal is common and preventable. This issue must be recognized because it can be adjusted through appropriate clinical management. This article systematically reviews the clinical features, biological mechanisms, coping strategies, and antidepressant discontinuation strategies related to antidepressant discontinuation syndrome.
6.Efficacy and Safety of Sirolimus-Eluting Stent With Biodegradable Polymer Ultimaster™ in Unselected Korean Population: A Multicenter, Prospective, Observational Study From Korean Multicenter Ultimaster Registry
Soohyung PARK ; Seung-Woon RHA ; Byoung Geol CHOI ; Jae-Bin SEO ; Ik Jun CHOI ; Sung-Il WOO ; Soo-Han KIM ; Tae Hoon AHN ; Jae Sang KIM ; Ae-Young HER ; Ji-Hun AHN ; Han Cheol LEE ; Jaewoong CHOI ; Jin Soo BYON ; Markz RMP SINURAT ; Se Yeon CHOI ; Jinah CHA ; Su Jin HYUN ; Cheol Ung CHOI ; Chang Gyu PARK
Korean Circulation Journal 2024;54(6):339-350
Background and Objectives:
Ultimaster™, a third-generation sirolimus-eluting stent using biodegradable polymer, has been introduced to overcome long term adverse vascular events, such as restenosis or stent thrombosis. In the present study, we aimed to evaluate the 12-month clinical outcomes of Ultimaster™ stents in Korean patients with coronary artery disease.
Methods:
This study is a multicenter, prospective, observational registry across 12 hospitals. To reflect real-world clinical evidence, non-selective subtypes of patients and lesions were included in this study. The study end point was target lesion failure (TLF) (the composite of cardiac death, target vessel myocardial infarction [MI], and target lesion revascularization [TLR]) at 12-month clinical follow up.
Results:
A total of 576 patients were enrolled between November 2016 and May 2021. Most of the patients were male (76.5%), with a mean age of 66.0±11.2 years. Among the included patients, 40.1% had diabetes mellitus (DM) and 67.9% had acute coronary syndrome (ACS).At 12 months, the incidence of TLF was 4.1%. The incidence of cardiac death was 1.5%, MI was 1.0%, TLR was 2.7%, and stent thrombosis was 0.6%. In subgroup analysis based on the presence of ACS, DM, hypertension, dyslipidemia, or bifurcation, there were no major differences in the incidence of the primary endpoint.
Conclusions
The present registry shows that Ultimaster™ stent is safe and effective for routine real-world clinical practice in non-selective Korean patients, having a low rate of adverse events at least up to 12 months.
7.Non-Infectious Acute Genital Ulcers in Females:Clinical Characteristics and Association with Systemic Diseases
Hee Ung PARK ; Hyun Woo JANG ; Kyung Bae JUNG ; Do-Young KIM
Korean Journal of Dermatology 2024;62(7):400-406
Background:
Genital ulcers exhibit a wide range of clinical symptoms influenced by both infectious and non-infectious factors, necessitating precise differential diagnosis. Non-infectious causes, including Behçet’s disease, Crohn’s disease, and Lipschütz ulcers, present diagnostic challenges due to their diverse manifestations and potential association with systemic diseases.
Objective:
To analyze the clinical characteristics of non-infectious acute genital ulcers in females and explore their association with systemic diseases, aiming to enhance the differential diagnosis process and contribute to the development of clinical guidelines.
Methods:
A retrospective study at Severance Hospital involved 12 female patients with sudden-onset of deep genital ulcers, recorded from January 2015 to December 2022. Data included age of the onset, history of genital and oral ulcers, symptoms, polymerase chain reaction for sexually transmitted diseases, serology for Epstein-Barr virus (EBV), Cytomegalovirus (CMV), Herpes simplex virus (HSV), and HLA-B51 testing.
Results:
The average age of onset for genital ulcers was 27.6 years. All patients experienced oral ulcers. Serology for EBV, CMV, and HSV showed predominantly negative results. Recurrence of genital ulcers was observed in five patients, with three of these patients diagnosed with systemic diseases: one with Crohn’s disease, one with typical Behçet’s disease, and one with gastrointestinal Behçet’s disease.
Conclusion
Our study highlights the intricacy of diagnosing non-infectious genital ulcers in females, emphasizing the need for a comprehensive diagnostic approach to consider a range of etiologies. The association with systemic diseases in certain cases underscores the importance of a broad diagnostic perspective, especially in recurrent or atypical presentations.
8.Diagnostic Process of Subcorneal Pustular Dermatosis: A Case Report
Gi Ung HA ; Seok-Jong LEE ; Weon Ju LEE ; Yong Hyun JANG ; Jun Young KIM ; Dae-Lyong HA ; Kyung Duck PARK
Korean Journal of Dermatology 2024;62(3):169-171
A 54-year-old man presented to our outpatient clinic with generalized pruritic millet-sized vesicles, pustules, and crusts on the whole body over the past 10 years, which were more dominant in the lower extremities. Due to the difficulty in diagnosis, a series of histopathologic examinations were conducted during the treatment course, and the findings were similar: subcorneal pustules with neutrophils, superficial perivascular and dermal infiltration of lymphocytes, neutrophils, and eosinophils, with no sign of acantholysis. The patient was treated with cyclosporine, prednisolone, doxycycline, colchicine, sulfasalazine, and acitretin; however, his condition did not improve. After showing a dramatic improvement with dapsone, he was finally diagnosed with subcorneal pustular dermatosis (SPD).Various medications commonly used in inflammatory and immunobullous skin diseases were tried but failed to improve the condition; the patient showed a dramatic response only to dapsone. Due to its rarity, careful attention and repeated biopsies are required for diagnosing SPD.
9.Air leakage due to the cuff hanging on the vocal cords during nasotracheal intubation: a case report
Seung-Hwa RYOO ; Myong-Hwan KARM ; Se-Ung PARK ; Hyun Jeong KIM ; Kwang-Suk SEO
Journal of Dental Anesthesia and Pain Medicine 2023;23(1):39-43
Nasotracheal intubation is commonly performed under general anesthesia in oral and maxillofacial surgery. For the convenience of surgery, nasal Ring-Adair-Elwyn (RAE) tubes are mainly used. Because the nasal RAE tubes were bent in an “L” shape, the insertion depth was limited. Particularly, it is necessary to accurately determine the appropriate depth of the RAE tubes in children. Several types of nasal RAE tubes are used in the medical market, which vary in material and length. We performed endotracheal intubation using a nasal RAE tube for double-jaw surgery, but air leakage persisted even when the air pressure in the cuff was increased. When checked with a laryngoscope, it was confirmed that the tube was pushed out, and the cuff was caught on the vocal cords, causing air leakage. Since inserting the tube deeply did not solve the problem, replacing it with a nasal RAE tube (Polar TM , Preformed Tracheal Tube, Smith Medical, Inc., USA) did not cause air leakage; thus, we reported this case.
10.Korean vs. Western Exercise Capacity Nomograms for Korean Patients With Cardiovascular Disease
Soohyung PARK ; Byambakhand BATTUMUR ; Seo Yeon YOON ; Yohan LEE ; Se hyun PARK ; Kyuho LEE ; Seungmin BACK ; Jieun LEE ; Dong Oh KANG ; Jah Yeon CHOI ; Seung-Young ROH ; Jin Oh NA ; Cheol Ung CHOI ; Jin Won KIM ; Seung-Woon RHA ; Chang Gyu PARK ; Eung Ju KIM
Journal of Korean Medical Science 2023;38(23):e179-
Background:
Exercise capacity is known to be an independent predictor of cardiovascular events and mortality. However, most previous studies were based on Western populations.Further study is warranted for Asian patients according to ethnic or national standards. We aimed to compare prognostic values of Korean and Western nomograms for exercise capacity in Korean patients with cardiovascular disease (CVD).
Methods:
In this retrospective cohort study, we enrolled 1,178 patients (62 ± 11 years;78% male) between June 2015 and May 2020, who were referred for cardiopulmonary exercise testing in our cardiac rehabilitation program. The median follow-up period was 1.6 years. Exercise capacity was measured in metabolic equivalents by direct gas exchange method during the treadmill test. The nomogram for exercise capacity from healthy Korean individuals and a previous landmark Western study was used to determine the percentage of predicted exercise capacity. The primary endpoint was the composite of major adverse cardiovascular events (MACE; all-cause death, myocardial infarction, repeat revascularization, stroke and hospitalization for heart failure).
Results:
A multivariate analysis showed that the risk of primary endpoint was more than double (hazard ratio [HR], 2.20; 95% confidence interval [CI], 1.10–4.40) in the patients with lower exercise capacity (< 85% of predicted) by Korean nomogram. The lower exercise capacity was one of the strong independent predictors along with left ventricular ejection fraction, age, and level of hemoglobin. However, the lower exercise capacity by Western nomogram could not predict the primary endpoint (HR, 1.33; 95% CI, 0.85–2.10).
Conclusion
Korean patients with CVD with lower exercise capacity have higher risk of MACE.Considering inter-ethnic differences in cardiorespiratory fitness, the Korean nomogram provides more suitable reference values than the Western nomogram to determine lower exercise capacity and predict cardiovascular events in Korean patients with CVD.

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