Chiaki Yagi
University of the Ryukyus
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Chiaki Yagi.
International Journal of Clinical Oncology | 2008
Tsuguhisa Nashiro; Chiaki Yagi; Makoto Hirakawa; Morihiko Inamine; Yutaka Nagai; Kaoru Sakumoto; Wakana Tamaki; Kazuhiko Ogawa; Takafumi Toita; Yoichi Aoki
BackgroundWe reviewed our experience with patients with primary squamous cell carcinoma of the vagina who received concurrent chemoradiation therapy (CCRT).MethodsWe retrospectively analyzed six patients (median age, 60 years) with squamous cell carcinoma of the vagina who underwent CCRT between 2002 and 2005 at the University of the Ryukyus Hospital. Two patients were in International Federation of Obstetricians and Gynecologists (FIGO) stage II, one in stage III, and three in stage IVA. All patients had an Eastern Cooperative Oncology Group (ECOG) performance status of 2 or less. Tumor size ranged from 3.2 to 7.7 cm. All patients were treated with true pelvic external-beam radiotherapy (EBRT) at 50 Gy. Then two of the six patients underwent intracavitary vaginal brachy-therapy. The remaining four patients received boost EBRT with shrinking fields. Total radiation dose to the vaginal tumor ranged from 60 to 66 Gy. All patients received two or three concomitant cycles of cisplatin during EBRT.ResultsAll six patients completed their scheduled CCRT, and achieved a clinical complete response. One stage II patient died of disease 24 months after treatment, and the stage III patient had local failure at 12 months. The remaining four patients were free of their disease at 18, 23, 33, and 55 months, respectively. One patient with stage IVA developed a vesicovaginal fistula during CCRT. Nevertheless, CCRT was well tolerated by all six patients, and no grade 3 or 4 late toxicity was observed, as evaluated by the Radiation Therapy Oncology Group (RTOG) scoring system.ConclusionCCRT is effective for primary squamous cell carcinoma of the vagina and should be considered for treatment in patients with high-risk disease having good performance status.
International Journal of Gynecological Cancer | 2008
Makoto Hirakawa; Yutaka Nagai; Chiaki Yagi; T. Nashiro; Morihiko Inamine; Yoichi Aoki
Prognosis in the few patients with advanced-stage juvenile granulosa cell tumor (JGCT) of the ovary has traditionally been unfavorable. We report a recurrent JGCT patient managed by palliative radiotherapy. A 37-year-old woman with recurrent JGCT received a combination of paclitaxel–carboplatin chemotherapy and then single-agent docetaxel, but her disease progressed with multiple abdominal masses and ascites. We chose palliative radiation therapy to relieve her complaints. Whole-abdominal external beam radiotherapy with pelvic boost was delivered. She tolerated the treatment well. After the completion of radiotherapy, ultrasonography showed shrinkage of the tumor, and the ascites disappeared. We should consider using radiation therapy in a palliative setting for such patients with recurrent JGCT suffering from abdominal complaints
Archives of Gynecology and Obstetrics | 2011
Keiko Mekaru; Chiaki Yagi; Kozue Asato; Hitoshi Masamoto; Kaoru Sakumoto; Yoichi Aoki
PurposeThe purpose of this study was to investigate the fertility outcomes of infertile patients having proximal tubal obstruction treated with hysteroscopic tubal catheterization (HCT) for recanalization under diagnostic laparoscopy.MethodsFrom January 2000 to December 2008, diagnostic laparoscopy was used to assess the tubal status of 61 patients with unilateral or bilateral proximal tubal obstruction, as confirmed by hysterosalpingography. Among them, 35 patients with tubal obstruction confirmed by chromopertubation under laparoscopy subsequently underwent HCT. The pregnancy outcomes and success rates of recanalization were investigated.ResultsIn the 35 patients with confirmed tubal obstruction, HCT was performed in 54 fallopian tubes. The success rate of recanalization was 25.9% (14/54) per tube and 37.1% (13/35) per patient. Of the patients in whom tubal patency was restored, 4 achieved pregnancy, including 1 tubal pregnancy and 1 miscarriage. Among the 61 patients, excluding 14 who underwent in vitro fertilization–embryo transfer (IVF–ET) after laparoscopy, 13 were pregnant (27.7%), 9 gave live births, 1 had tubal pregnancy, and 3 had miscarriages.ConclusionsHCT under laparoscopy is an option for couples with tubal infertility who do not prefer IVF–ET.
Archives of Gynecology and Obstetrics | 2009
Keiko Mekaru; Chiaki Yagi; Tadakazu Uezato; Hitoshi Masamoto; Yoichi Aoki
BackgroundWe describe a case that developed a delayed pneumothorax after laparoscopic surgery.CaseA 40-year-old woman (BMI: 19.1) underwent a laparoscopic ovarian cystectomy. On the first postoperative day, she developed a pneumothorax. The subcutaneous CO2 tracked up through the fascial planes, and ruptured into the pleural space, where delayed pneumothorax developed.ConclusionGynecologists should be aware of pneumothorax after laparoscopic surgery and should also keep in mind its possible delayed development.
Journal of Obstetrics and Gynaecology | 2008
Morihiko Inamine; Yutaka Nagai; Makoto Hirakawa; Keiko Mekaru; Chiaki Yagi; Hitoshi Masamoto; Yoichi Aoki
Summary The human enzyme heparanase has been shown to function in tumour progression, metastatic spread and tumour angiogenesis. The aim of the present study was to assess heparanase expression assessed by immunohistochemical staining (IHC) in endometrial cancer in correlation with clinicopathological factors. A total of 52 endometrial cancers were obtained from previously untreated patients (median age, 56 years, range, 35–80 years). The expression of heparanase was evaluated by using IHC with anti-heparanase polyclonal antibody. This antibody was raised by immunising a rabbit with a peptide containing the amino acid residues from 238 to 250 of the heparanase. The IHC data were used to determine the relationship between heparanase expression, and clinicopathological parameters. IHC showed that the heparanase was expressed in 23 of 52 (44.2%) endometrial cancers. Heparanase was abundantly and equally expressed in both the cytoplasm and the cell membrane of the cells in endometrial cancer. Strong heparanase-positive staining was also seen at the invasive front of the tumour into myometrium. The expression was significantly related to lymph-vascular space involvement (p = 0.0028), depth of myometrial invasion (p = 0.0026), and histological tumour grade (p = 0.0135). In six tumours with positive lymph nodes, the heparanase expression was observed as being higher compared with tumours with negative lymph nodes, which was not significant (p = 0.2349). In terms of peritoneal cytology, ovarian metastasis, and cervical invasion, we observed no significant difference in the heparanase expression assessed by IHC. These results suggest that the expression of heparanase may promote tumour invasion into myometrium and lymph vascular space in endometrial cancer.
Reproductive Medicine and Biology | 2012
Keiko Mekaru; Chiaki Yagi; Kozue Asato; Hitoshi Masamoto; Kaoru Sakumoto; Yoichi Aoki
PurposeWe aimed to compare the efficacy of a gonadotropin-releasing hormone (GnRH) antagonist protocol and a GnRH agonist long protocol used in the first in vitro fertilization–embryo transfer (IVF–ET) cycle in an unspecified population of infertile couples.MethodsFifty and 34 patients were treated with a GnRH agonist long protocol (agonist group) and GnRH antagonist protocol (antagonist group), respectively, in the first treatment cycle. The primary and secondary outcome measures were cumulative live birth rates after fresh and cryopreserved–thawed ETs and incidence of grades II and III ovarian hyperstimulation syndrome (OHSS), respectively.ResultsNo significant differences were observed in clinical pregnancy rates (38.0 vs. 32.4%) and live birth rates (22.0 vs. 23.5%), which included both fresh and cryopreserved–thawed ETs, between the 2 groups. However, the incidence of grade III OHSS was significantly lower with the GnRH antagonist protocol than the GnRH agonist long protocol.ConclusionsUsed in the first IVF–ET cycle in an unspecified population of infertile patients, the GnRH antagonist protocol showed the same clinical outcome as the GnRH agonist long protocol.
Journal of Minimally Invasive Gynecology | 2008
Keiko Mekaru; Shigeru Kamiyama; Hitoshi Masamoto; Chiaki Yagi; Makoto Hirakawa; Morihiko Inamine; Yutaka Nagai; Kaoru Sakumoto; Yoichi Aoki
Lymphocyst formation is a common complication of pelvic lymphadenectomy. We treated a 54-year-old woman with lymphocele by laparoscopic marsupialization. She developed hydronephrosis as a result of retroperitoneal lymphocele after total abdominal hysterectomy and pelvic lymphadenectomy for endometrial cancer. Laparoscopic marsupialization under transvaginal ultrasonographic guidance was chosen because conservative therapy including percutaneous or transvaginal drainage ran the risk of bowel perforation. The 6-cm collection was opened and its edges were coagulated electrosurgically and sutured with the surrounding peritoneum. The postoperative course was satisfactory, and hydronephrosis was resolved. This highly effective minimally invasive procedure was beneficial to the patient.
Archives of Gynecology and Obstetrics | 2008
Keiko Mekaru; Shigeru Kamiyama; Hitoshi Masamoto; Chiaki Yagi; Makoto Hirakawa; Morihiko Inamine; Yutaka Nagai; Kaoru Sakumoto; Yoichi Aoki
琉球医学会誌 = Ryukyu Medical Journal | 2013
Lin Tong; Keiko Mekaru; Chiaki Yagi; Kozue Asato; Tadatsugu Kinjyo; Hitoshi Masamoto; Zhang Xiulan; Yoichi Aoki
Japanese Journal of Gynecologic and Obstetric Endoscopy | 2012
Kozue Asato; Chiaki Yagi; Keiko Mekaru; Morihiko Inamine; Yoichi Aoki