Kouki Samejima

ORCID: 0000-0002-1621-720X
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About
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Research Areas
  • Uterine Myomas and Treatments
  • Endometriosis Research and Treatment
  • Gynecological conditions and treatments
  • Maternal and fetal healthcare
  • Ovarian function and disorders
  • Ectopic Pregnancy Diagnosis and Management
  • Pelvic floor disorders treatments
  • Assisted Reproductive Technology and Twin Pregnancy
  • Minimally Invasive Surgical Techniques
  • Reproductive Biology and Fertility
  • Pregnancy-related medical research
  • Ovarian cancer diagnosis and treatment
  • Pelvic and Acetabular Injuries
  • Streptococcal Infections and Treatments
  • Neonatal and Maternal Infections
  • Organ Donation and Transplantation
  • Dermatological and COVID-19 studies
  • Hernia repair and management
  • Blood Coagulation and Thrombosis Mechanisms
  • Cardiovascular Issues in Pregnancy
  • Sarcoma Diagnosis and Treatment
  • Cutaneous Melanoma Detection and Management
  • Parvovirus B19 Infection Studies
  • Intestinal Malrotation and Obstruction Disorders
  • Appendicitis Diagnosis and Management

Saitama Medical University
2015-2024

Social Insurance Saitama Chuo Hospital
2015-2024

Progestin-primed ovarian stimulation (PPOS) has been used in infertility cases recent years, and several reports have stated that it oocyte collection results similar to those of gonadotropin-releasing hormone antagonist (GnRH-ant) protocol. For emergency fertility preservation, random-start is usually recommended. Therefore we compared the clinical outcomes PPOS with conventional GnRH-ant protocols fertility-preserving cases.We retrospectively examined 86 cycles collection, which 56 were 30...

10.1186/s13048-021-00935-5 article EN cc-by Journal of Ovarian Research 2022-01-04

OBJECTIVE The objective of this study was to demonstrate an ameliorated laparoscopic technique cornual resection that minimizes complications during the management ectopic pregnancy. DESIGN Stepwise demonstration is presented with narrated video footage. difference between and other conventional methods illustrated. SETTING Cornual pregnancy accounts for 2%–4% all pregnancies.[1] Conventional includes cornuostomy, resection, wedge resection.[2,3] Possible issues these procedures are...

10.4103/gmit.gmit_16_23 article EN cc-by-nc-sa Gynecology and Minimally Invasive Therapy 2023-04-01

Primary malignant melanoma of the vagina is an extremely rare disease affecting 3% patients with vaginal tumors. It compared to primary skin and its prognosis unfavorable even in Stage I disease. Here, we report a case discuss our experience regard previously published literature.

10.1186/s40064-014-0773-x article EN SpringerPlus 2015-02-27

Pulmonary thromboembolism (PTE) can result in significant adverse maternal and fetal outcomes. Monteplase—a recombinant tissue plasminogen activator—is considered effective for the treatment of PTE; however, only a few reports have described cases wherein surgical procedures were performed following with monteplase. Here, we present patient diagnosed massive PTE at 28 weeks gestation leading to cardiac arrest intrauterine death. The was treated percutaneous cardiopulmonary support...

10.1136/bcr-2013-009431 article EN BMJ Case Reports 2013-05-23

Ovarian hyperstimulation syndrome is normally induced by ovarian stimulation drugs. Severe cases of involve complications such as renal failure and thrombosis. Evidence has recently been developed for a method to prevent syndrome. Most are an early-onset type, which occurs shortly after injection human chorionic gonadotropin. However, late-onset syndrome, in pregnancy cycle, also requires caution. We report our experience treating woman who was transported hospital with severe case occurring...

10.1186/s13256-020-02439-0 article EN cc-by Journal of Medical Case Reports 2020-07-19

Abstract Aim Umbilical cord ulceration (UCU) is a disease in which an ulcer forms the umbilical pregnant uterus and accompanied by hemorrhaging from same site. UCU occurs fetuses with congenital upper‐intestinal atresia (CUIA); however, its onset mechanism remains unclear. Here, we report our investigation of cases hospital. Methods Among 9825 deliveries performed between 2007 2016 at this hospital, 20 were diagnosed CUIA, 4 (20%) had UCU. There was no difference backgrounds (UCU group:...

10.1111/jog.13611 article EN Journal of Obstetrics and Gynaecology Research 2018-03-08

There is concern about the development of anemia-associated fetal hydrops associated with maternal parvovirus B19 infection. Parvovirus infection occurs via globoside (P antigen) receptor, main glycolipid erythroid cells, which induces apoptosis. Similar findings have been reported for P antigen globoside-containing placental trophoblast cells. A 32-year-old woman was infected human at week 32 pregnancy, and had severe anemia 34. At 37, an emergency cesarean section performed because sudden...

10.1186/s40064-016-2946-2 article EN SpringerPlus 2016-08-08

Introduction: Breakage of instruments during laparoscopic surgery is rare, but may carry serious medicolegal implications. We report a patient in whom small piece broken instrument was found 10 years after surgery, and laparoscopically removed with the guidance intraoperative X-ray fluoroscopy.

10.5180/jsgoe.33.151 article EN JAPANESE JOURNAL OF GYNECOLOGIC AND OBSTETRIC ENDOSCOPY 2017-01-01

Abstract Aim To investigate the efficacy and safety of long‐term adjusted low‐dose gonadotropin‐releasing hormone agonist therapy (GnRH drawback therapy) with nafarelin acetate in patients uterine fibroids and/or adenomyosis menstrual symptoms. Methods This single‐center, retrospective, observational study initially included 118 symptoms who had received GnRH (nafarelin acetate) for at least 7 months between 2010 2020. Blood hemoglobin level, maximum fibroid diameter, area corpus uteri,...

10.1111/jog.16128 article EN Journal of Obstetrics and Gynaecology Research 2024-10-27

Abstract Aim Perinatal group A streptococcal infection is a rare but life‐threatening condition. Few reports have focused on its clinical characteristics and how to prevent deterioration. We report our experience with two antenatal fatal cases reviewed 96 in the literature assess of infection. Methods English‐language postnatal 1974–2019 were retrieved examined. Relationships between maternal outcomes assessed. Results Univariate analysis revealed that was significantly associated an age ≤19...

10.1111/jog.14497 article EN cc-by Journal of Obstetrics and Gynaecology Research 2020-09-17

In the field of oncofertility, patients with breast cancer are often administered letrozole as an adjuvant drug before and after oocyte retrieval to prevent increase in circulating estradiol.We report a case abdominal hemorrhage due ovarian rupture 29-year-old Japanese patient who restarted 2 days procedure which 14 mature oocytes were retrieved. The had sought embryo cryopreservation fertility preservation option undergoing treatment for recurrent cancer. A day restarting treatment,...

10.1186/s13256-021-02938-8 article EN cc-by Journal of Medical Case Reports 2021-06-26

Abstract Aim Relatively small benign ovarian cysts are conservatively managed in early pregnancy. However, emergency surgery is required should acute abdomen occur. Our study aimed to examine and compare the outcomes of treated with elective laparoscopic or during Methods From 2004 2017, we 135 pregnant patients (110 25 emergencies) at our tertiary perinatal center compared their surgical outcomes. Results There was no significant difference cyst diameter (7.6 ± 2.5 vs. 6.8 2.1 cm), but...

10.1111/jog.15357 article EN Journal of Obstetrics and Gynaecology Research 2022-07-26

Abstract Aim The high rate of stored preoperative autologous blood wastage is concerning. This study analyzed patients who provided donations (PABDs) for massive bleeding during surgery placenta previas and low‐lying placentas, investigated the optimal PABD storage volume required to avoid allogeneic transfusion. Methods Of 386 PABDs at our hospital from 2008 2013, 269 with or placentas were retrospectively analyzed. volumes stratified into four groups based on amounts stored, transfusion...

10.1111/jog.14044 article EN Journal of Obstetrics and Gynaecology Research 2019-06-25

With an incidence of 0.005%, unscarred uterine rupture is extremely rare. It difficult to diagnose because the absence characteristic clinical symptoms. Here, we report a rare case 31-year-old woman with that was accurately diagnosed and repaired by laparoscopy hysteroscopy on postpartum day 69. The patient recovered uneventfully discharged postoperative 4. Three months after surgery, pelvic magnetic resonance imaging performed, which confirmed wound repair. In women stable condition, could...

10.1016/j.lers.2022.06.003 article EN cc-by-nc-nd Laparoscopic Endoscopic and Robotic Surgery 2022-07-01

Pregnancy complicated with ovarian endometrioma is a risk factor for preterm delivery and rupture or infection during pregnancy. This study aimed to clarify the effectiveness safety of transvaginal aspiration pregnancy diagnosed in first trimester.This retrospective observational included 8 pregnant women who underwent cyst at 12-14 weeks (aspiration group) between March 2011-March 2018 23 refused same period (observation group).Characteristics patients were compared both groups. Safety,...

10.1016/j.jogoh.2021.102146 article EN cc-by Journal of Gynecology Obstetrics and Human Reproduction 2021-04-21

Background: Total laparoscopic hysterectomy (TLH) has become popular for total in recent years. However, the procedure higher incidence of ureteral injury as compared with abdominal (ATH). Assessing hydronephrosis is a useful method checking ureteric postoperative follow-up.Subjects/Methods: The 165 cases TLH performed at this institution between 2009 and 2014 were retrospectively examined. We investigated proportion which late-onset manifested follow-up period, surgical findings clinical...

10.5180/jsgoe.31.362 article EN JAPANESE JOURNAL OF GYNECOLOGIC AND OBSTETRIC ENDOSCOPY 2016-01-01

<h3>Introduction</h3> In Japan's Cervical Cancer Screening Guidelines (2020), the cervical cytology alone method is recommended to be performed every 2 years as a cancer screening. On other hand, its sensitivity and specificity are varied, respectively, approximately 6% of results false-negative. this study, we investigated status screening in prior diagnosis our cases, examined risk factor(s) for underestimation by <h3>Methods</h3> patients who underwent initial treatment at hospital...

10.1136/ijgc-2023-igcs.430 article EN 2023-11-01

Introduction: Lipoleiomyomas are rare and asymptomatic benign tumors with an incidence of 0.03-0.2%. Pathologically, mature fat cells mixed smooth muscle cells. Here, we report the case successful laparoscopic resection uterine tumor which was preoperatively diagnosed as ovarian dermoid cyst lipoleiomyoma by perioperative pathology.

10.5180/jsgoe.33.116 article EN JAPANESE JOURNAL OF GYNECOLOGIC AND OBSTETRIC ENDOSCOPY 2017-01-01

Objective: Atypical endometrial hyperplasia (AEMH) is a precancerous lesion of the endometrium, which often treated with laparoscopic hysterectomy. However, we report some cases in postoperative diagnosis cancer (EMC) was made although AEMH had been diagnosed preoperatively. In present study, retrospectively investigated clinical features EMC patients

10.5180/jsgoe.34.2_184 article EN JAPANESE JOURNAL OF GYNECOLOGIC AND OBSTETRIC ENDOSCOPY 2018-01-01

Laparoscopic myomectomy (LM) is currently widely used as surgical treatment for uterine fibroids; however, it may be technically challenging in some patients with cervical fibroids whom laparotomy needs to performed. Reportedly, preoperative artery embolization and intraoperative cutting ligation of the reduce bleeding during myomectomies. Notably, maintaining maximal blood flow necessary who desire fertility preservation; unfortunately, currently, no such method available.

10.5180/jsgoe.36.2_216 article EN JAPANESE JOURNAL OF GYNECOLOGIC AND OBSTETRIC ENDOSCOPY 2020-01-01

Introduction: A unicornuate uterus with a noncommunicating rudimentary horn is rare congenital uterine malformation that causes lower abdominal pain and dysmenorrhea due to endometriosis hematoma. We encountered case of was safely treated through laparoscopic removal the horn. The treatment strategy determined following evaluation preoperative 3D-reconstructed computed tomography (CT) images.

10.5180/jsgoe.36.2_158 article EN JAPANESE JOURNAL OF GYNECOLOGIC AND OBSTETRIC ENDOSCOPY 2020-01-01

Endometrial stromal sarcoma, a rare disease, accounts for approximately 0.2% of all types uterine malignancies. The disease may be difficult to differentiate from the benign one using preoperative imaging and histological diagnosis. We report case patient who underwent robot-assisted surgery adenomyosis was diagnosed with low-grade endometrial sarcoma. She additional laparoscopic initial surgical wound. A 45-year-old gravida 4, para 2 referred because excessive menstruation caused by...

10.5180/jsgoe.38.1_204 article EN JAPANESE JOURNAL OF GYNECOLOGIC AND OBSTETRIC ENDOSCOPY 2022-01-01

Introduction: Interstitial pregnancies are rare. There have been sporadic reports of postoperative uterine scar rupture; precise frequency is unknown. Herein, we report a case where rupture was observed during cesarean section after surgery for interstitial ectopic pregnancy.

10.5180/jsgoe.38.2_108 article EN JAPANESE JOURNAL OF GYNECOLOGIC AND OBSTETRIC ENDOSCOPY 2022-01-01

Introduction: Pelvic inflammatory disease (PID) affects 4% of women, especially in younger age groups and occasionally, patients with diabetes. We report a case PID treated laparoscopic surgery patient uncontrolled type 2 diabetes mellitus.

10.5180/jsgoe.38.2_125 article EN JAPANESE JOURNAL OF GYNECOLOGIC AND OBSTETRIC ENDOSCOPY 2022-01-01
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