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Long-term outcomes of single-port laparoscopic myomectomy using a modified suture technique
( Mina Kang ),( Jihye Kim ),( Tae-joong Kim ),( Jeong-won Lee ),( Byoung-gie Kim ),( Duk-soo Bae ),( Chel Hun Choi ) 대한산부인과학회 2020 Obstetrics & Gynecology Science Vol.63 No.2
Objective To evaluate the long-term outcomes, including the pregnancy outcome and recurrence rate after single-port laparoscopic myomectomy (LM) using a modified suture technique with a Hem-o-lok clip (Choi’s LM) and conventional 4-port LM. Methods A retrospective study of patients who underwent Choi’s LM (n=55) and 4-port LM (n=102) in a single institutional hospital was conducted. Patients with <3 symptomatic myomas sized <10 cm each and operated on by a single surgeon were included. Recurrence was confirmed when a myoma measuring ≥3 cm was detected. Results The patients in both groups had similar demographic characteristics. Single (76.4% vs. 62.7%) and intramural (52.7% vs. 56.9%) tumors were commonly detected in both groups in the mean diameter (6.8±1.5 cm vs. 7.0±1.6 cm; P=0.40). In Choi’s LM, 16 patients (29.1%) needed an additional port; those who were nulliparous and/or had a large leiomyoma more frequently required an additional port (P=0.023 and 0.04, respectively). During a median follow-up period of 69 months, 17 patients (7.1% vs. 14.6%) had recurrence. The size of dominant myomas at recurrence was significantly smaller in patients who underwent Choi’s LM (3.4±0.7 cm vs. 5.7±2.4 cm; P=0.004). All 13 patients in both groups who successfully conceived had a full-term delivery. No major complications occurred during pregnancy. Conclusion Although an additional port was frequently used, the long-term outcomes of patients who experienced recurrence and pregnancy after Choi’s LM were acceptable. Considering its usability, Choi’s LM is feasible for the treatment of uterine leiomyoma.
Won Kyung Cho,Hyun-Soo Kim,Won Park,Chi-Son Chang,Yoo-Young Lee,Chel Hun Choi,Tae-Joong Kim,Jeong-Won Lee,Byoung-Gie Kim 대한부인종양학회 2022 Journal of Gynecologic Oncology Vol.33 No.6
Objective: The recently updated World Health Organization classification divides endocervical adenocarcinomas (ADCs) into human papillomavirus (HPV)-associated (HPVA) and HPV-independent (HPVI) ADCs. This study aimed to investigate the differences in the clinical features and treatment outcomes between patients with HPVA and HPVI. Methods: We retrospectively reviewed the electronic medical records and pathology slides of 123 patients with endocervical ADC who underwent radical hysterectomy and adjuvant radiation therapy. Tumor characteristics, patterns of failure, and survival outcomes were compared between HPVA and HPVI ADCs. Results: Eighty-one (65.9%) and 42 (34.1%) patients were diagnosed with HPVA and HPVI ADCs, respectively. HPVI ADC showed more frequent positive vaginal resection margin (VRM) and peritoneal seeding than HPVA ADC. After a median follow-up of 58.1 months, local recurrence and distant metastasis were more frequently observed in HPVI ADC than in HPVA ADC. Both local recurrence-free survival (77.3% vs. 91.8%) and distant metastasis-free survival (50.1% vs. 73.7%) rates of HPVI ADC were lower than those of HPVA ADC. Disease- free survival was not significantly different between HPVI and HPVA ADCs. Conclusion: We demonstrated that HPVI ADC exhibited higher rates of VRM involvement and peritoneal seeding than those of HPVA ADC, resulting in higher rates of local recurrence and distant metastasis. Further studies with larger populations are warranted to explore optimal treatment strategies based on the histological subtypes of endocervical ADC.
Choi, Won Chel,Kim, Tae Geun,Kim, Jin-Sang IOP Pub 2006 Nanotechnology Vol.17 No.4
<P>We report strong visible photoluminescence (PL) from thermally treated tetra-ethyl-ortho-silicate (TEOS) thin films at room temperature. High-resolution transmission electron microscope (HRTEM) studies showed that the PL originated from nanocrystalline-Si (nc-Si). HRTEM images showed that as-grown TEOS thin films had quasi-static amorphous (QSA) SiO<SUB>2</SUB> phases instead of the typical amorphous (TA) SiO<SUB>2</SUB> phases, and that they divided into small pieces of nc-Si after thermal treatment. In addition, Fourier transform infrared (FTIR) investigations showed that the QSA-SiO<SUB>2</SUB> phases were composed of three types of bonding modes (i.e., Si–O–Si bending, Si–O bending, and Si–O–Si stretching), which play important roles in the formation of the nc-Si at relatively lower annealing temperatures.</P>
Meta-analysis of the effects of beta blocker on survival time in cancer patients
( Chel Hun Choi ),( Tae Jong Song ),( Tae Hyun Kim ),( Jun Kuk Choi ),( Jin Young Park ),( Aera Yoon ),( Yoo Young Lee ),( Tae Joong Kim ),( Duk Soo Bae ),( Jeong Won Lee ),( Byoung Gie Kim ) 대한산부인과학회 2012 대한산부인과학회 학술대회 Vol.99 No.-
Knowledge of the role of beta blockers on cancer survival may be helpful for cancer patients.This study was to elucidate the potential benefit of beta blockers on cancer survival. We comprehensively searched PubMed, Embase, and the Cochrane Library from their inception to April 2013. Two authors independently screened and reviewed the eligibility of each study and coded the participants, treatment, and outcome characteristics. The primary outcomes were overall survival (OS) and disease-free survival (DFS). Twelve studies published between 1993 and 2013 were included in the final analysis. Four papers reported results from 10 independent groups, resulting in a total of 18 comparisons based on data obtained from 20,898 subjects. Effect sizes (hazard ratios) were heterogeneous and random effects models were used in the analyses. The meta-analysis demonstrated that beta blocker use can improve OS (HR=0.79; 95% CI 0.67 - 0.93; p=0.004) and DFS (HR=0.69; 95% CI 0.53 - 0.91; p=0.009). Although statistically not significant, the effect size was greater in patients with low stage cancer or cancer treated primarily with surgery than in patients with high stage cancer or cancer treated primarily without surgery (HR: 0.60 vs. 0.78, and 0.60 vs. 0.80, respectively). Although only two study codes were analyzed, the studies using nonselective beta blockers showed that there was no overall effect on OS (HR = 0.52, 95% CI: 0.09 - 3.04). This meta-analysis provides evidence that beta blocker use can prolong the survival of cancer patients, especially patients with early stage cancer treated primarily with surgery.
( Hie Jun Yeo ),( Kyoung Won Noh ),( Chel Hun Choi ),( Tae-joong Kim ),( Jeong-won Lee ),( Byoung-gie Kim ),( Duk-soo Bae ),( Won Kyung Cho ),( Won Park ),( Yoo-young Lee ) 대한산부인과학회 2020 대한산부인과학회 학술대회 Vol.106 No.-
Objective: This study aimed to evaluate the effect of waiting time from diagnosis to initiation of definitive concurrent chemoradiation (CCRT) on overall survival in patients with cervical cancer. Methods: Patients with cervical cancer who had definitive CCRT between 2000 and 2017 were retrospectively reviewed. Time from pathological diagnosis to definitive CCRT was analyzed both as a continuous variable (per day) and as a categorical variable in 2 groups (Group 1 median, Group 2 > median). Patients with waiting time more than 60 days were excluded. Associations between waiting time, patients baseline characteristics, and survivals were analyzed using the Cox proportional-hazards model. Results: The median waiting time was 14 days (0-60). There were differences between Group 1 and Group 2 in age and type of chemotherapy. However, no significant difference was found in the FIGO stage, cell type, and the number of cycles of chemotherapy received during CCRT. Longer waiting time was associated with poorer overall survival on the Kaplan-Meir curve (Group 1 vs. Group 2, P = .042). On multivariate analysis, intervals as either a continuous variable (HR; 1. 023, 95% CI; 1.0061.040, P = .007) or a categorical variable (HR; 1.513, 95% CI; 1.0732.134, P = .018), FIGO stage, cell type, and the number of cycles of chemotherapy received during CCRT were significant independent prognostic factors for overall survival. Conclusion: Longer waiting time from pathological diagnosis to definitive CCRT was associated with worse overall survival. Our findings suggest that stakeholders in healthcare, including physicians and policymakers, should make an effort to minimize waiting time by rethinking factors involved in waiting time, such as referral time and time from decision making to treatment.
Choi, Chel-Jong,Kang, Seung-Min,Hong, Hyo-Bong,Lee, Soo-Hyung,Kim, Jin-Gyu,Ahn, Kwang-Soon,Yoon, Jong-Won The Japan Institute of Metals 2010 MATERIALS TRANSACTIONS Vol.51 No.4
<P>We fabricated metal-oxide-semiconductor (MOS) devices with a high-k Er-silicate gate dielectric, and demonstrated their electrical performance. The increase in the rapid thermal annealing (RTA) temperature leads to a reduction of the equivalent oxide thickness (EOT), which is attributed in par to the thickness evolution of Er-silicate film and to the chemical bonding change from an Si-rich to an Er-rich silicate. The <I>in-situ</I> investigation of the interfacial reaction between the Er and SiO<SUB>2</SUB> film using a high-voltage electron microscopy (HVEM) revealed a linear relationship between the squared thickness of Er-silicate layer and <I>in-situ</I> annealing time, indicating that the Er-silicate growth is a diffusion-controlled process. The parabolic growth constants of the Er-silicate film were calculated to be 2.3×10<SUP>−16</SUP> and 9.3×10<SUP>−16</SUP> cm<SUP>2</SUP>/s for <I>in-situ</I> annealing temperatures of 350 and 450°C, respectively.</P>
최진영,정해원,조철오 한국유전학회 1988 Genes & Genomics Vol.10 No.2
This study was to investigate the effect of anticancer drugs on tumor cell populations which are heterogeneous in their physiologic, morphologic and genetic characteristics in relation to tumor progression and chromosomal change. P815 cell derived from DBA-2 mouse was used for the investigation. Tumor cell population was selected by anticancer drugs such as adriamycin, cisplatin, 5-fluorouracil and methotrexate, and the selected tumor cell subpopulation by anticancer drug were studied for their karyotypic characteristics in connection with drug resistance. The chromosomes of tumor cell population were examined at the end of time intervals specified after drug treatment, and the variations in chromosome number and structure were studied. Drug resistant cell lines were obtained by maintaining the cells in the medium containing specified concentration of anticancer drug, and the cross resistance to other kind of anticancer drug was analysed.
Choi, Chel Hun,Song, Sang Yong,Kang, Heeseok,Lee, Yoo-Young,Kim, Chul-Jung,Lee, Jeong-Won,Kim, Tae-Joong,Kim, Byoung-Gie,Lee, Je-Ho,Bae, Duk-Soo Blackwell Publishing Asia 2010 JOURNAL OF OBSTETRICS AND GYNAECOLOGY RESEARCH -TO Vol.36 No.2
<P>Abstract</P><P>Aim: </P><P>To better predict treatment responses for managing bulky cervical carcinoma with neoadjuvant chemotherapy (NAC).</P><P>Methods: </P><P>The expression of p-STAT3 was analyzed by immunohistochemistry using paraffin-embedded pretreatment cervical biopsy tissues. The study included 29 patients with bulky IB to IIA cervical squamous cell carcinoma treated with NAC.</P><P>Results: </P><P>Twenty (69.0%) of 29 patients were scored as p-STAT3-positive. Pathological response to chemotherapy (complete response or residual tumor with less than 3 mm stromal invasion) was observed in eight patients (27.6%). The p-STAT3-positive patients had a longer disease-free survival compared to p-STAT3-negative patients (<I>P</I> = 0.03), though they had more frequent clinical nodal involvement (<I>P</I> = 0.046).</P><P>Conclusion: </P><P>Pretreatment assessment of p-STAT3 expression may provide additional information for the identification of patients with cervical cancer who have a favorable prognosis.</P>