Kye Hyun Kim

Sungkyunkwan University, Sŏul, Seoul, South Korea

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Publications (23)38.1 Total impact

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    ABSTRACT: Study objective: To assess the utility of TachoSil for achieving hemostasis after loop electrosurgical excision procedure (LEEP). Design: Case-control study (Canadian Task Force Classification II-2). Setting: University hospital. Patients: One hundred seventy-three patients who underwent LEEP. Interventions: Patients were managed by LEEP with application of TachoSil (TachoSil group, n=75) or without application of TachoSil (control group, n=94). Measurements and main results: Patient characteristics (age, specimen depth, resection margin, LEEP histopathology, or use of TachoSil) except for parity were similar between the two study groups. Severe bleeding requiring any intervention developed in 14% of patients (24 of 169 patients), without any statistically significant difference between the two groups (11% in the TachoSil group vs. 17% in the control group; P=0.274). On the logistic regression analysis, other potential clinico-pathologic parameters, including age, parity, specimen depth, involvement of the resection margin, and LEEP histopathology, were not correlated with severe bleeding after LEEP. Conclusion: The use of TachoSil may not reduce the incidence of severe bleeding after LEEP.
    No preview · Article · Oct 2015 · European journal of obstetrics, gynecology, and reproductive biology
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    ABSTRACT: To investigate the public perception of laparoendoscopic single-site surgery (LESS) according to the age group. An anonymous questionnaire about the desire for cosmesis and the preference for LESS in treatment of benign gynecologic diseases was provided to healthy volunteers (n=102). The survey participants were divided into two age groups (young women ≤40 years and middle-aged women >40 years). The desire for cosmesis was assessed using a validated scale, Body Image Scale. All of the participants completed the questionnaire. The Body Image Scale scores were not different between the two age groups (11.5±3.5 vs. 11.8±4.0, P=0.656). The most common fear of surgery was the risk of complications in both age groups (69% in the young age group and 65% in the middle-aged group). Unless the operative risk increased, most of the participants (61% to 67%) in both age groups preferred LESS. Their choice was influenced by reduced scarring (43% to 61%), more safety (20% to 39%), reduced postoperative pain (8% to 10%), and new technology (4% to 6%). Based on these results, there was no difference in the desire for cosmesis and perception of LESS according to the age. Therefore, physicians should discuss and consider LESS even in middle-aged women.
    Preview · Article · Jul 2015
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    ABSTRACT: The fallopian tube is considered as the site of origin of serous ovarian cancer, and risk-reducing salpingectomy (RRS) has been proposed as a new and safe strategy for preventing ovarian cancer. However, little is known about the public perception of RRS. We performed a questionnaire survey of 100 healthy female volunteers in November 2014. Questionnaire for this survey included questions on demographics, medical history, knowledge of and belief about RRS, and barrier to its application. Among 100 respondents, 71% did not realize the seriousness of ovarian cancer, 79% were unaware of the fact that salpinx was the origin of ovarian cancer, and 87% stated that they had never heard of RRS as a preventive method for ovarian cancer. Also, 98% of respondents replied that they had the right to be informed about RRS and the choice given. The respondents' fears about RRS included increased risk of surgical complications (68%), no benefit (8%), and increased surgical costs (3%). Most general women were unaware of RRS as a method for preventing ovarian cancer in women at average risk. Therefore, physicians should discuss RRS with patients and consider this procedure at the time of abdominal or pelvic surgery.
    Preview · Article · Jul 2015
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    ABSTRACT: Objective: To compare postoperative cosmetic outcomes according to different umbilical closure methods after single port laparoscopic surgery (SP-LS). Study design: A total of 138 women who were scheduled to receive elective SP-LS were randomized to undergo closure of the umbilical incision with either a subcutaneous suture only without subcuticular skin suture (case group, n = 68) or both a subcutaneous suture and subcuticular skin suture (control group, n = 70) after fascial closure. At postoperative months 1 and 3, the umbilical scar was evaluated using the Vancouver scar scale (VSS), the patient and observer scar assessment scale, and a visual analog scale (VAS). Overall satisfaction with scar cosmesis and surgery was assessed with the VAS. Results: There was no significant difference in the clinical characteristics and operative data between the groups. The objective and subjective scar assessments and the overall satisfaction with scar cosmesis were not different between the groups. In the control group, four (5.7%) women experienced wound discharge and were treated with conservative treatments and delayed closure. In women who completed the first and second assessments, the changes in the scar assessment and overall satisfaction with the scar according to time after surgery were not different in either group, but the patient scar assessment scale in both groups and the VSS in the case group improved. Conclusions: After SP-LS, the approximation of the fascia and subcutaneous layer seems to be enough for the closure of an umbilical incision. Skin closure with subcuticular sutures did not improve the postoperative cosmetic outcomes and might lead to impaired wound healing. However, large randomized trials with various closure techniques and materials are needed to confirm this finding.
    No preview · Article · Jun 2015 · European Journal of Obstetrics & Gynecology and Reproductive Biology
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    ABSTRACT: To determine whether the different phases (follicular phase, luteal phase, or menstruation) of the menstrual cycle could affect the operative blood loss at the time of a laparoscopic myomectomy. Retrospective comparative study SETTING: University hospital PATIENTS: A total of 220 patients who underwent a laparoscopic myomectomy were classified into the follicular phase (n=90), luteal phase (n=93), and menstruation group (n=37) on the basis of the adjusted day of the menstrual cycle. Laparoscopic myomectomy MAIN OUTCOME MEASURE(S): The operative blood loss. The baseline demographics (age, body mass index, and myoma characteristics) were similar between the three groups. No significant differences were observed in the operative blood loss (P=0.231) and in the hemoglobin change (P=0.526) among the three groups. In addition, no other statistical differences were found in terms of the other operative results, including the operative time, the length of hospital stay, and operative complications. The different phase of the menstrual cycle had no effect in the operative blood loss during laparoscopic myomectomy. Therefore, the menstrual cycle is not an important factor to determine the optimal timing of a laparoscopic myomectomy. Copyright © 2015 AAGL. Published by Elsevier Inc. All rights reserved.
    No preview · Article · Jun 2015 · Journal of Minimally Invasive Gynecology
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    Jin-Sung Yuk · Hyun Young Ji · Kye Hyun Kim · Jung Hun Lee
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    ABSTRACT: Objective: To evaluate whether single-port laparoscopically assisted-transumbilical ultraminilaparotomic myomectomy (SPLA-TUM) has a shorter operating time than single port laparoscopic myomectomy (SP-LM), without negatively affecting postoperative pain and cosmesis. Study design: We performed a randomized controlled trial at a University teaching hospital. A total of 92 premenopausal women with symptomatic, superficial intramural or subserosal fibroids were randomized to receive either SPLA-TUM or SP-LM. The primary outcome measured was the operating time. The secondary outcome measures included postoperative pain, as measured by a visual analog scale (VAS) at 2, 6, 12, 24, and 48h after the operation, and cosmetic outcomes, as measured by the Vancouver scar scale (VSS) and patient satisfaction with the scars, using a VAS at 3 postoperative months. Results: There were no differences in the patient demographics or in the clinical characteristics of the resected fibroids between the two groups. The operation results showed no differences in the hemoglobin changes, return of bowel activity, hospital stay, and complication rate between the groups. The mean operating time in the SPLA-TUM group was shorter than that in the SP-LM group (87.0±32.7min compared with 102.3±32.9min, P=0.026). The patients in each group demonstrated no differences in their postoperative pain levels, VSS scores, and satisfaction with the scars, but the SPLA-TUM group had a longer umbilical wound compared with the SP-LM group. Two (4.3%) patients in the SPLA-TUM group received SP-LM. One (2.2%) patient in the SP-LM group and two (4.3%) patients in the SPLA-TUM group were converted to two or three port laparoscopic myomectomy. Conclusions: SPLA-TUM has a shorter operating time than SP-LM due to convenient suturing and knotting; the two procedures have comparable postoperative pain levels and cosmetic outcomes. However, further study is needed to evaluate the long-term outcomes of SPLA-TUM.
    Full-text · Article · Mar 2015 · European Journal of Obstetrics & Gynecology and Reproductive Biology
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    ABSTRACT: We investigated the neurogenic potentials of amniotic fluid-derived stem cells (AFSCs) according to the expression levels of stem cell markers and ingredients in the neural induction media.
    Preview · Article · Jan 2015
  • Taejong Song · Woo Young Kim · Kyo Won Lee · Kye Hyun Kim
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    ABSTRACT: We compared the postoperative decrease in ovarian reserve between hemostasis by bipolar coagulation versus suture during laparoendoscopic single-site cystectomy (LESS-C) for ovarian endometrioma.DesignProspective comparative study (Canadian Task Force Classification II-1)SettingUniversity hospitalPatientsOne hundred twenty-five patients with ovarian endometriomasInterventionsPatients with endometrioma were managed by hemostasis with either bipolar coagulation (n=62) or suture (n=63) during LESS-C. We evaluated the impact of surgery on ovarian reserve using serum anti-Müllerian hormone (AMH) levels, which were measured before surgery and 3 months after surgery in all patients.Measurement and Main Results: Baseline characteristics such as age, bilaterality of endometrioma, and preoperative AMH level were similar between the two study groups. There were also no differences between the two groups in surgical outcomes, such as operative time, operative blood loss, or operative complications. In both study groups, postoperative AMH levels were lower than preoperative AMH levels (P<0.001). The decline rate of AMH levels was significantly greater in the bipolar coagulation group than in the suture group (42.2% [IQR, 16.5-53.0%] and 24.6% [IQR, 11.6-37.0%], respectively, P=0.001).Conclusion Hemostasis by bipolar coagulation after stripping of the endometrioma during LESS-C reduces ovarian reserve more than suturing does, as determined by serial AMH levels. Suturing may therefore be a better hemostatic choice after stripping ovarian endometriomas.
    No preview · Article · Nov 2014 · Journal of Minimally Invasive Gynecology
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    ABSTRACT: Background: To evaluate the feasibility of conization without a prior punch biopsy for patients with abnormal cytology. Methods: A retrospective review was performed for 700 patients who underwent conization at a single institution from January 2003 to August 2012. Each of these patients was assigned to one of two groups, either the 'see-and-treat' group or the 'three-step' group, depending on whether the patient had undergone a punch biopsy before conization or not. The final histologic results of two groups were compared. Results: The overtreatment risk was higher in the 'see-and-treat' group in patients with atypical squamous cells of undetermined significance/low-grade squamous intraepithelial lesion (ASCUS/LSIL) cytology (64.7% in the 'see-and-treat' group vs. 36.5% in the 'three-step' group; p = 0.001). There was no significant statistical difference in the rate of cervical dysplasia or invasive carcinoma in patients with high-grade squamous intraepithelial lesion (HSIL) cytology between groups (91.8% in the 'see-and-treat' group vs. 93.5% in the 'three-step' group; p = 0.793). Conclusion: The patients with HSIL on cytology can be managed by a 'see-and-treat' strategy with a low risk of overtreatment. On the other hand, the 'three-step' management is more appropriate in patients with ASCUS/LSIL cytology.
    No preview · Article · Oct 2014 · Gynecologic and Obstetric Investigation
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    ABSTRACT: Background: The aim of current study was to determine whether single-port laparoscopic surgery (SP-LS) improves the health-related quality of life (QoL) compared with conventional laparoscopic surgery (conventional LS) in women with benign gynecologic disease. Methods: We performed a prospective case-control study from October 2010 to December 2012. A total of 273 women with benign gynecologic disease participated in this study, and 135 of them were in the SP-LS group and 138 in the conventional LS. We evaluated QoL after SP-LS or conventional LS. All patients were asked to complete short-form 36 (SF-36) QoL health surveys preoperatively and at 1, 3, and 6 months postoperatively. Results: Clinical characteristics and operative outcomes showed no significant differences between both groups. SP-LS had no benefits in QoL compared with conventional LS in the main categories, even though SP-LS showed statistically significant higher scores than conventional LS for the role of physical domain at 1 month postoperatively and for social function at 3 months postoperatively. In contrast to this, conventional LS had statistically significant higher scores than SP-LS for role function, bodily pain, general health, vitality, and emotional well-being at 6 months postoperatively. Conclusions: With a 6-month follow-up, SP-LS does not offer a QoL benefit over conventional LS in women with benign gynecologic disease. However, a larger prospective randomized study would be required to confirm this.
    Full-text · Article · Oct 2014 · Surgical Endoscopy
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    Min Kyung Kim · Kye Hyun Kim · Jin-Sung Yuk · Jung Hun Lee

    Full-text · Article · Jul 2014
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    Ji Ye Kim · Kye Hyun Kim · Joong Sub Choi · Jung Hun Lee
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    ABSTRACT: Study Objective: To compare operative and obstetric outcomes of laparoendoscopic single-site myomectomy (LESS-M) vs conventional laparoscopic myomectomy (LM). Design: Prospective matched case-control study. Setting: A university hospital and a tertiary care center. Patients: Forty-five women underwent LESS-M, and 90 women underwent conventional LM. Intervention: LESS-M or conventional LM. Measurements and Main Results: Operative and obstetric outcomes. There were no significant differences between the 2 groups in demographic characteristics, operative time (135 vs 140 minutes), change in hemoglobin concentration (1.9 vs 1.95 g/dL), return of bowel activity (35 vs 28 hours), hospital stay (5 vs 5 days), or complication rate (11.1% vs 8.9%). Insofar as obstetric outcomes, no significant differences were observed between the 2 groups for duration of follow-up (24.4 vs 23.2 months), pregnancy rate in patients who desired pregnancy (66.7% vs 50.0%), full-term delivery rate (66.7% vs 58.3%), and time to first pregnancy after surgery (7.6 vs 10.1 months). Conclusion: LESS-M is feasible and safe and has comparable obstetric outcomes to conventional LM in selected women with symptomatic myomas. However, a large prospective randomized study is needed.
    Full-text · Article · May 2014 · Journal of Minimally Invasive Gynecology
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    Kye Hyun Kim · Mi-Kyung Lee
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    ABSTRACT: The female genital tract is equipped to deal with a variety of foreign substances including a wide array of microorganisms. It is important to consider Candida-bacterial interactions in balance between healthy colonization versus vaginitis. The objectives of this study were to evaluate the association between microorganism distribution and vaginitis, and to investigate the possibility of an interaction between vaginal Candida and other microorganisms in female genital tract.
    Preview · Article · Jan 2012
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    ABSTRACT: Infectious vaginitis is caused primarily by three different groups of microbial pathogens (Trichomonas vaginalis, Candida spp., and Gardnerella vaginalis). The objective of this study was to compare the Affirm VPIII assay using a DNA hybridization technique with the Papanicolaou (Pap) smear test and the Gram stain in the detection and identification of these three organisms.
    Preview · Article · Jan 2012
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    ABSTRACT: To determine the parameters associated with the risk for abnormal glucose tolerance (AGT) among women with polycystic ovary syndrome (PCOS) and to assess the optimal screening tests to predict AGT within this population.
    Preview · Article · Jan 2012
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    ABSTRACT: Most tumor tissue is composed of parenchymal tumor cells and tumor stroma. Mesenchymal stem cells (MSCs) can function as precursors for tumor stromal cells, including myofibroblasts, which provide a favorable environment for tumor progression. A close relationship between tumor cells and MSCs in a tumor microenvironment has been described. Exosomes are small membrane vesicles that are enriched with a discrete set of cellular proteins, and are therefore expected to exert diverse biological functions according to cell origin. In the current study, we determined the biological effect of exosomes from two ovarian cancer cell lines (SK-OV-3 and OVCAR-3) on adipose tissue-derived MSCs (ADSCs). Exosome treatment induced ADSCs to exhibit the typical characteristics of tumor-associated myofibroblasts, with increased expression of α-SMA, and also increased expression of tumor-promoting factors (SDF-1 and TGF-β). This phenomenon was correlated with an increased expression of TGF-β receptors I and II. Analysis of TGF-β receptor-mediated downstream signaling pathways revealed that each exosome activated different signaling pathways, showing that exosomes from SK-OV-3 cells increased the phosphorylated form of SMAD2, which is essential in the SMAD-dependent pathway, whereas exosomes from OVCAR-3 cells increased the phosphorylated form of AKT, a representative SMAD-independent pathway. Taken together, exosomes from ovarian cancer cells induced the myofibroblastic phenotype and functionality in ADSCs by activating an intracellular signaling pathway, although the activated pathway could differ from exosome-to-exosome. The current study suggested that ovarian cancer-derived exosomes contribute to the generation of tumor-associated myofibroblasts from MSCs in tumor stroma.
    No preview · Article · Sep 2011 · Gynecologic Oncology
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    ABSTRACT: To mitigate TOT complications we designed a modified TOT technique called canal TOT. We describe this new technique and evaluate its feasibility. Between October 2006 and June 2007, 105 consecutive women with stress urinary incontinence underwent a canal TOT procedure. Two oblique lateral incisions were made in the anterior vaginal wall and a suburethral canal was created between the incisions. Mesh was transferred beneath the canal. The subsequent canal TOT surgical steps were identical to those of the original TOT procedure. All patients were evaluated by urological examination and self-assessment questionnaires (Incontinence Impact Questionnaire-Short Form and Urogenital Distress Inventory-Short Form) preoperatively and 12 months postoperatively. Reportedly dyspareunia developed after the operation. A minimum 1-year followup was available in 99 patients. Median operative time was 25 minutes (range 15 to 50). No mesh erosion, retropubic hematoma or complete bladder retention developed. Transient postoperative voiding dysfunction and transient de novo urgency were observed in 2 (2.0%) and 8 patients (8.1%), respectively. Dyspareunia developed after surgery in 4 patients (4.0%). Postoperatively Incontinence Impact Questionnaire-Short Form and Urogenital Distress Inventory-Short Form scores decreased significantly (p <0.05). Objective and subjective cure rates were 98.0% and 89.9%, respectively. The canal TOT procedure is feasible and effective for mitigating the complications of the original TOT procedure. This technique might be especially useful in patients with cystocele because of the paravaginal defect as well as in patients with obesity or prior vaginal surgery. However, a large-scale and long-term followup study is required to verify the effectiveness of this technique.
    No preview · Article · Apr 2009 · The Journal of urology
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    ABSTRACT: The purpose of the present study was to assess the objective and subjective efficacy of the distal urethral polypropylene sling (DUPS) for urodynamic stress incontinence (USI) in Korean women. We performed DUPS in 89 consecutive patients with USI. The Incontinence Impact Questionnaire (IIQ-7) and the Urogenital Distress Inventory (UDI-6) were used to evaluate the surgical outcomes. The mean operative time was 29.4 min (range 25-40). Concomitant procedures were performed including rectocele repair (n = 48), laparoscopically assisted vaginal hysterectomy (n = 12) and laparoscopic myomectomy (n = 1). There were no intraoperative complications or major postoperative complications. The average follow-up was 15 months (range 12-18). Both mean IIQ-7 and UDI-6 scores decreased significantly after DUPS. In addition, 87% of the patients reported no symptoms of USI under any circumstances and 95% of the patients reported never or rarely being bothered by USI. DUPS is a safe, inexpensive, simple, and effective surgical method for USI. The procedure provides a high cure rate in Korean women.
    No preview · Article · Feb 2009 · Urologia Internationalis
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    ABSTRACT: We analyzed the mutation spectrum of BRCA1 and BRCA2 genes in 354 Korean breast cancer patients. Overall, 40 patients carried 25 distinct BRCA1/2 mutations including 12 novel mutations. Seven district mutations were found in multiple unrelated patients, with the BRCA2 c.7480C>T mutation detected in eight unrelated patients, accounting for 50% of the mutations detected in BRCA2. The large number (25/40, 62.5%) of recurrent mutations suggests the possibility of developing a simple screening test for these mutations. The frequency of mutations was related to the number and kinds of risk factors, varying from 10.4 to 25% in the five major risk factor groups. The frequency of BRCA mutations in patients with two or more risk factors was markedly higher than that in patients with one risk factor.
    No preview · Article · Jan 2007 · Cancer Letters
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    ABSTRACT: To assess the feasibility and efficacy of laparoscopically-assisted-vaginal hysterectomy (LAVH) for a large uterus with the new trocar technique. Retrospective clinical study (Canadian Task Force classification III). University teaching hospital. Thirty-four women with a large uterus (>500 g). LAVH with Choi's 4-trocar method. We reviewed the medical records of 34 patients for age, parity, history of previous abdominal surgery, operative indications, histopathologic diagnosis, mean operative time, weight of the removed uterus, change in the hemoglobin level, hospital stay, and occurrence of any complications. The patient's median age was 45 years (range 36-51 years), median parity was 2 (range 0-3), and 18 patients (52.9%) had a previous operative history. The most common operative indication was a palpable abdominal mass, and the most common histopathologic diagnosis was leiomyoma. The median operative time was 62.5 minutes (range 35-245 minutes), and the median weight of the removed uterus was 615.0 g (range 500-1200 g). The median change in hemoglobin level was 1.4 g/dL (range 0-5 g/dL). The median hospital stay was 4.0 days (range 2-6 days). The only complication was superficial port site bleeding (1 patient). None of the operations were switched to total abdominal hysterectomy. Choi's 4-trocar method provided an excellent operative field during LAVH for a large uterus.
    No preview · Article · Jul 2006 · Journal of Minimally Invasive Gynecology