Koji Matsuo

INTRODUCTION: Maternal outcomes of pregnancy with subclinical hypothyroidism continue to be active areas of research interest. The objective of this study was to compare severe maternal morbidity at delivery between pregnant patients with s…

BACKGROUND: Early detection of epithelial ovarian cancer (EOC) remains a major clinical challenge. Although serum tumor markers are widely used for detection, their diagnostic performance remains limited. We previously developed a comprehen…

Role of labor induction requiring cervical preparation for full-term, low-risk pregnant patients is under active investigation. The objective of this study was to describe nationwide temporal trends, characteristics, and outcomes associated…

PURPOSE: To assess national trends, characteristics, and delivery outcomes associated with gestational carriers (GC) pregnancies. METHODS: This cross-sectional study queried the Healthcare Cost and Utilization Project's National Inpatient …

In this nationwide cross‐sectional study in the United States, clinical and gynecologic characteristics varied across the anatomical site of ectopic pregnancy.

Epithelial ovarian cancer (EOC) is widely recognized as the most lethal gynecological malignancy; however, its early-stage detection remains a considerable clinical challenge. To address this, we have introduced a new method, named Comprehe…

PURPOSE: To examine the utilization and characteristics related to the use of hysteroscopy at the time of endometrial evaluation for endometrial hyperplasia in the outpatient surgery setting. METHODS: This cross-sectional study queried the…

BACKGROUND: Although hysteropexy has been used to preserve the uterus during uterine prolapse surgery for a long time, there is a scarcity of data that describe the nationwide patterns of use of this surgical procedure. OBJECTIVE: This stu…

PURPOSE: To examine feto-maternal characteristics and outcomes of morbidly obese pregnant patients who conceived with assisted reproductive technology (ART). METHODS: This cross-sectional study queried the Healthcare Cost and Utilization P…

OBJECTIVE: To examine pregnancy characteristics and maternal morbidity at delivery among pregnant patients with a diagnosis of endometriosis. STUDY DESIGN: This cross-sectional study queried the Healthcare Cost and Utilization Project's Na…

INTRODUCTION: This study examined obstetric outcomes in patients diagnosed with uterine adenomyosis. MATERIAL AND METHODS: This historical cohort study queried the Healthcare Cost and Utilization Project's National Inpatient Sample. The st…

Association of intraoperative tumor spill and adverse oncologic outcome has been reported in various gynecologic and non-gynecologic malignancies. To date, this association has not been examined in endometrial cancer surgery. The objective …

STUDY OBJECTIVE: The findings of previous studies have been inconsistent as to whether benign hysterectomy via minimally invasive laparoscopic surgery increases the risk of vesicoureteral injury when compared with laparotomy. The objectives…

OBJECTIVE: To examine the incidence and prognostic effects of intraoperative capsule rupture and to assess the effectiveness of postoperative chemotherapy for intraoperative tumor rupture in apparent stage I epithelial ovarian cancer. METH…

OBJECTIVE: To profile patient characteristics associated with and outcomes of ovarian conservation at the time of hysterectomy in young women with minimal-risk endometrial cancer. METHODS: A population-based retrospective analysis of the N…

OBJECTIVE: To examine the association between ovarian conservation and oncologic outcome in surgically-treated young women with early-stage, low-grade endometrial cancer. METHODS: This multicenter retrospective study examined women aged <5…

OBJECTIVE: To examine the trends of epithelial ovarian cancer histologic subtypes in Japan. METHODS: A nationwide retrospective registry study was performed between 2002 and 2015 (Japan cohort, n = 48,640). Trends were also examined in The…

Ovarian clear cell carcinoma (OCCC) is distinctive from other histological types of epithelial ovarian cancer, with genetic/epigenetic alterations, a specific immune-related molecular profile, and epidemiologic associations with ethnicity a…

PURPOSE: While adenomyosis is one of the most common benign histologic findings in hysterectomy specimens of endometrial cancer, demographics of endometrial cancer arising in adenomyosis (EC-AIA) has not been well elucidated. The aim of thi…

A 56-year-old G3P3 postmenopausal woman presented with a 5 month history of abnormal uterine bleeding and pelvic pain. A computed tomographic scan revealed a 5 cm right adnexal cystic mass in addition to a thickened, heterogenous endometriu…