Publications by authors named "Kazuyoshi Kato"

There are several retrospective studies which have suggested that optimal cytoreductive surgery for stage IV endometrial cancer improves survival [1-3]. In addition, some investigators have reported that achieving maximal cytoreduction to a visibly disease-free outcome in the abdominal cavity for endometrial cancer with distant metastases can extend patients' survival [4]. Due to the anatomic proximity of the rectosigmoid colon to the female pelvic organs and its involvement in locally advanced endometrial cancer, an en bloc resection of the uterus, adnexa, and rectosigmoid, also known as a modified posterior pelvic exenteration (MPPE), is performed to achieve optimal cytoreduction [5,6].

View Article and Find Full Text PDF
Article Synopsis
  • The study aimed to evaluate the oncologic outcomes of patients with early-stage, intermediate-risk cervical cancer after surgical treatment, focusing on various postoperative therapy types.
  • Researchers analyzed data from 1,084 patients in a retrospective cohort study, categorizing them based on histology and recurrence risk after undergoing radical hysterectomy and lymphadenectomy.
  • Results indicated that patients with no lympho-vascular space invasion had better 5-year disease-free survival rates (93.3%) compared to those with more severe invasion patterns, with similar survival rates across different postoperative therapies.
View Article and Find Full Text PDF

Objectives: There are few reported cases of robot-assisted surgery for endometrial cancer with para-aortic lymphadenectomy (PAL) in Japan. Therefore, this study aimed to examine the clinical outcomes of robot-assisted surgery with PAL for endometrial cancer.

Materials And Methods: This retrospective cohort study was analyzed 13 endometrial cancer patients who underwent robotic surgery with PAL between January 2011 and October 2018 at our hospital.

View Article and Find Full Text PDF

Objective: We investigated whether pretreatment systemic inflammatory markers are associated with survival outcomes in patients with endometrial cancer (EC).

Methods: Data from the Japanese Gynecologic Oncology Group 2043 were analyzed. Patients who did not receive chemotherapy or were lost to follow-up were excluded.

View Article and Find Full Text PDF

Endometriosis is highly dependent on angiogenesis and lymphangiogenesis. Prostaglandin E2, an arachidonic acid metabolite, has been shown to promote the formation of new blood and lymphatic vessels. However, the role of another arachidonic acid metabolite, thromboxane A (TXA) in angiogenesis and lymphangiogenesis during endometriosis remains largely unexplored.

View Article and Find Full Text PDF

Objective: The number of type-II endometrial cancer patients has been increasing and the prognosis is not favorable. We aim to investigate whether sarcopenia index in any of several different muscles could serve as a novel biomarker of prognosis in patients with type-II endometrial cancer.

Methods: We retrospectively investigated a total of 194 patients at four hospitals.

View Article and Find Full Text PDF
Article Synopsis
  • The study investigates the genetic background, clinical features, and treatment options for low-grade and high-grade endometrial stromal sarcomas (LGESS and HGESS) and undifferentiated uterine sarcomas (UUS) in light of recent changes in classification and staging.
  • The analysis included 72 LGESS, 25 HGESS, and 16 UUS patients, highlighting that LGESS has a 5-year overall survival (OS) rate of 94%, whereas HGESS and UUS rates are significantly lower at 53% and 25%, respectively.
  • Key findings indicate that poor OS in LGESS is linked to advanced stage, incomplete surgery, and lack of progesterone receptors, while UUS has
View Article and Find Full Text PDF

Background: MicroRNAs (miRNA) are promising biomarkers for cancer diagnosis and prognosis; miR-100 expression is decreased in cervical cancer tissues.

Objective: To determine whether miR-100 is a useful biomarker for early cervical cancer diagnosis.

Methods: Total RNA was extracted from the sera of 34 healthy controls (HC), 64 cervical intraepithelial neoplasia patients (CIN), and 46 cervical cancer patients (CC).

View Article and Find Full Text PDF

Background: The aim of this study was to investigate the safety and clinical usefulness of early oral feeding (EOF) after rectosigmoid resection with anastomosis for the treatment of primary ovarian cancer.

Methods: We performed a retrospective review of all consecutive patients who had undergone rectosigmoid resection with anastomosis for primary ovarian, tubal, or peritoneal cancer between April 2012 and March 2019 in a single institution. Patient-related, disease-related, and surgery-related data including the incidence of anastomotic leakage and postoperative hospital stay were collected.

View Article and Find Full Text PDF
Article Synopsis
  • Carcinosarcoma (CS) is a rare and aggressive type of tumor in the uterus or ovary, consisting of both epithelial and mesenchymal components, with four molecular subtypes linked to patient outcomes.
  • Researchers conducted immune microenvironment analyses on CS samples using RNA-seq and other techniques to examine the role of immune cells in these tumors.
  • Results showed that hypermutator tumors (POLE and MSI) had more favorable immune cell profiles, whereas non-hypermutator tumors (CNH and CNL) had higher M2 macrophages, suggesting that understanding the immune environment might help improve clinical outcomes in gynecological CS.
View Article and Find Full Text PDF

Objective: We investigated the efficacy and toxicity of tailored-dose chemotherapy with gemcitabine and irinotecan for platinum-refractory/resistant ovarian or primary peritoneal cancer.

Methods: We enrolled patients with ovarian or primary peritoneal cancer who received ≥2 previous chemotherapeutic regimens but developed progressive disease during platinum-based chemotherapy or within 6 months post-treatment. All patients received gemcitabine (500 mg/m²) and irinotecan (50 mg/m²) on days 1 and 8 every 21 days at the starting dose.

View Article and Find Full Text PDF

Background: Two randomized phase III trials (EORTC55971 and CHORUS) showed similar progression-free and overall survival in primary or interval debulking surgery in ovarian cancer, however both studies had limitations with lower rate of complete resection and lack of surgical qualifications for participating centers. There is no consensus on whether neoadjuvant chemotherapy followed by interval debulking surgery (NACT-IDS) could be a preferred approach in the management of advanced epithelial ovarian cancer (EOC) in the clinical practice.

Methods: The Asian SUNNY study is an open-label, multicenter, randomized controlled, phase III trial to compare the effect of primary debulking surgery (PDS) to NACT-IDS in stages IIIC and IV EOC, fallopian tube cancer (FTC) or primary peritoneal carcinoma (PPC).

View Article and Find Full Text PDF

Background: The image diagnosis of idiopathic normal-pressure hydrocephalus (iNPH) is based on the ventriculomegaly, whose criterion is an Evans' Index (EI) >0.3. Recently, disproportionately enlarged subarachnoid space hydrocephalus (DESH) has been proposed as a morphological characteristic to iNPH.

View Article and Find Full Text PDF

Objective: This study aimed to evaluate the presence of pathological residual tumor (pRT) in each initial disseminated site after neoadjuvant chemotherapy (NACT) to assess the appropriate surgical margins during interval debulking surgery (IDS) for a favorable prognosis.

Methods: This prospective descriptive study included patients with stage IIIC-IV epithelial ovarian, fallopian tubal, and peritoneal cancer. One hundred eleven patients underwent diagnostic exploratory laparotomy, and their initial intra-abdominal dissemination statuses were recorded.

View Article and Find Full Text PDF

Objective: This study was performed to examine the safety of bowel resection and upper abdominal surgery in patients with advanced ovarian cancer performed by gynecologic oncologists after training in a monodisciplinary surgical team.

Methods: We implemented a monodisciplinary surgical team consisting of specialized gynecologic oncologist for advanced ovarian cancer. In the initial learning period in 65 patients with International Federation of Gynecology and Obstetrics (FIGO) III/IV, a gynecologic oncologist who had a certification as a general surgeon trained 2 other gynecologic oncologists in bowel resection and upper abdominal surgery for 4 years.

View Article and Find Full Text PDF

Carcinosarcoma (CS) of the uterus or ovary is a rare, aggressive and biphasic neoplasm composed of carcinoma and sarcoma elements. Previous genomic studies have identified the driver genes and genomic properties associated with CS. However, there is still no molecular subtyping scheme with clinical relevance for this disease.

View Article and Find Full Text PDF

Objective: Because of the anatomic proximity of the rectosigmoid to the female pelvic organs and its frequent involvement in ovarian cancer, an en bloc resection of ovarian tumors together with the uterus and rectosigmoid, also known as a modified posterior pelvic exenteration (MPPE), is frequently performed to achieve optimal cytoreduction [1]. Additionally, if the tumor has infiltrated the pelvic side-wall, a MPPE combined with pelvic side-wall resection can be selected [2]. We report the details of a technique for this surgery requiring intestinal and urinary reconstruction.

View Article and Find Full Text PDF

Objective: We aimed to develop and reinforce a clinical management regimen for atypical endometrial cell (ATEC) categories within the descriptive reporting format for endometrial cytology.

Methods: Between January 2013 and December 2014, 215 samples, for which histological examination was performed immediately or within 3 months after cytology, were cytologically diagnosed as ATEC. For these samples, the medical records were retrospectively reviewed to identify risk factors for malignancy.

View Article and Find Full Text PDF

Background: We present the study rationale and design of the JGOG3023 study, an open-label, parallel-arm, randomized, phase II trial that aimed to assess the efficacy and safety of chemotherapy with or without bevacizumab in patients with platinum-resistant recurrent epithelial ovarian, fallopian tube, or primary peritoneal cancer who were previously treated with bevacizumab for front-line or platinum-sensitive ovarian cancer. We hypothesize that patients treated with a combination of single-agent chemotherapy and bevacizumab will show improved progression-free survival (PFS) compared with those treated with single-agent chemotherapy alone, in the setting beyond disease progression following prior bevacizumab treatment.

Methods/design: A total of 106 patients who have recurrence or progression of ovarian cancer, while receiving chemotherapy or within 6 months after the final dose of platinum, after completing at least three cycles of bevacizumab plus platinum chemotherapy will be randomized in a 1:1 ratio to treatment with single-agent chemotherapy or single-agent chemotherapy combined with bevacizumab.

View Article and Find Full Text PDF

Study Objective: To show a novel combination laparoscopic and open perineal approach to complete resection of aggressive angiomyxoma.

Design: Step-by-step video demonstration of the combination approach (Canadian Task Force classification III).

Setting: Combined laparoscopic and open perineal approach was performed in the tertiary center.

View Article and Find Full Text PDF

Background: This was the first large-scale prospective observational Japanese study evaluating the safety and efficacy of bevacizumab combined with paclitaxel and carboplatin for newly diagnosed advanced ovarian cancer.

Methods: Patients were prospectively enrolled in the primary analysis cohort if they had Stage III or IV epithelial ovarian/fallopian tube/primary peritoneal cancer and were scheduled to receive paclitaxel plus carboplatin every 3 weeks in Cycles 1-6 and bevacizumab every 3 weeks in Cycles 2-22. Primary endpoints were bevacizumab-specific adverse events and adverse events ≥ Grade 3.

View Article and Find Full Text PDF

Study Objective: To show total laparoscopic complete resection of a recurrent low-grade endometrial sarcoma.

Design: Step-by-step demonstration of the technique of laparoscopic anterior pelvic exenteration with super radical parametrectomy, including the explanation of detailed pelvic anatomy (Canadian Task Force classification III).

Setting: Low-grade endometrial stromal sarcoma (LGESS) is a rare malignancy that makes up around 0.

View Article and Find Full Text PDF
Article Synopsis
  • Pegylated liposomal doxorubicin (PLD) has been linked to a rare but concerning condition known as squamous cell carcinoma of the tongue and oral cavity (SCCTO) in some patients, particularly those with long-term use.
  • A study analyzing 114 ovarian cancer patients receiving PLD aimed to determine the prevalence of oral leukoplakia, a precursor to SCCTO, and found this condition in 5.3% of patients, with a median PLD dose at diagnosis of 685 mg/m.
  • The findings suggest that a cumulative PLD dose of 400 mg/m or more significantly increases the risk of developing oral leukoplakia, highlighting the need for routine oral monitoring for these
View Article and Find Full Text PDF

Background: As atypical polypoid adenomyoma (APA) has been reported to be a hormone-related tumor, we aimed to analyze the efficacy and safety of maintenance hormonal therapy after fertility-preserving treatment of these patients with medroxyprogesterone acetate (MPA).

Methods: Data were retrospectively analyzed from patients with APA who were treated with a fertility-preserving regimen including MPA between October 2001 and December 2011. Eighteen patients were treated with MPA and 14 (77.

View Article and Find Full Text PDF