Yamamoto K

A mural solid component (SC) within an endometrioma (ovarian endometriotic cyst), demonstrating internal vascularity or increased fluorodeoxyglucose (FDG) uptake on positron emission tomography (PET), is considered a characteristic finding …

Uterine adenofibroma was previously classified as a benign mixed epithelial and mesenchymal tumor, but the WHO removed it from its fifth edition due to diagnostic overlap with low-grade adenosarcoma or benign polyps. We report a case of a 2…

Thyroid hormones are fundamental regulators of cellular differentiation, development, and metabolism. Their receptors are expressed in reproductive tissues, including the ovary, and dysregulation of thyroid hormone homeostasis has been asso…

Intramural pregnancy (IMP) is an extremely rare form of ectopic pregnancy (EP), typically associated with previous uterine trauma, adenomyosis, or assisted reproductive technology (ART), such as embryo transfer (ET). Despite its potentially…

An association has been reported between a lower pH in the uterus and an increased rate of implantation. How low pH regulates endometrial function is unclear. This study investigated the effect of low pH on the expression of leukemia inhibi…

Background: This study evaluated the effectiveness of preoperative inflammatory response markers in distinguishing clear cell carcinoma (CCC) and endometrioid carcinoma (EC) from ovarian endometrioma. Methods: Patients with stage I ovarian …

AIM: To identify the predictors for periureteral adhesions preoperatively. METHODS: Preoperative predictors for periureteral adhesions were evaluated in 407 patients who underwent laparoscopic hysterectomy (LH) for benign uterine diseases …

We report a rare case of triple primary cancers in a 52-year-old woman who presented with abdominal pain and fever. Diagnostic imaging and subsequent histopathological evaluation revealed independent primary endometrioid carcinomas of the o…

BackgroundWe aimed to determine the capabilities of compressed sensing (CS) and deep learning reconstruction (DLR) with those of conventional parallel imaging (PI) for improving image quality while reducing examination time on female pelvic…

BackgroundUterine leiomyomas are common for reproductive-aged women and affect women's quality of life due to heavy menstrual bleeding or dysmenorrhea. Leiomyomas grow according to estradiol exposure and decrease after post-menopause. In ca…

Pregnancy following adenomyomectomy is challenging because uterine rupture or placenta accreta spectrum (PAS) is more likely to occur; however, optimal management has not yet been established. We herein present a case of uterine rupture wit…

BackgroundAdenosarcoma is classified as a mixed epithelial and mesenchymal tumor composed of a benign epithelial component and a malignant stromal component. The stromal component in adenosarcoma is usually low grade, and consequently the p…

The overwhelming majority of participants in current genetic studies are of European ancestry. To elucidate disease biology in the East Asian population, we conducted a genome-wide association study (GWAS) with 212,453 Japanese individuals …

Interim results from the two-cohort, phase 2 KEYNOTE-100 study (NCT02674061) of 376 patients with previously treated advanced recurrent ovarian cancer (ROC) showed that pembrolizumab monotherapy was associated with an objective response rat…

Background Endometrioma generally shows higher intracystic signal intensity (SI) than mucinous cystadenoma (MCA) on T 1 ‐weighted imaging (T 1 WI). Nonendometrioma‐associated malignant ovarian epithelial tumors (nonendometrioma group) often…

Pancreatic cysts include a variety of benign, premalignant, and malignant lesions. Endometrial cysts in the pancreas are extremely rare lesions that are difficult to diagnose before surgery. We report the case of a 26-year-old patient with …

Highly malignant tumors overexpress the minichromosome maintenance 2 (MCM2) protein in the nucleus, which is associated with advanced tumor grade, advanced stage, and poor prognosis. In this study, we showed that MCM2 is highly expressed in…

Massive obstetric haemorrhage remains a major cause of maternal death attributable to hypofibrinogenaemia. Transfusion of large volumes of fresh frozen plasma (FFP) is required to normalise fibrinogen levels. We compared the efficacy of FFP…

We report six cases of Salmonella enterica serotype Paratyphi A infections in travelers returning from Myanmar. In 2015, 31 cases of paratyphoid fever were reported in Japan, and 54.8% of those traveled to Myanmar. Among them, six patients …

Clinical differentiation between decidualized endometrioma and malignant transformation still poses difficulties as both are intracystic vascularized excrescences of an endometrial cyst and exhibit similar characteristics on color-flow Dopp…

AIM: The aim of this study was to compare the effects of pre-surgical medication with dienogest or leuprorelin on post-surgical ovarian function. MATERIAL AND METHODS: We conducted an exploratory study in two centers in Japan that comprised…

The expression of vascular endothelial growth factor (VEGF) and cyclooxygenase-2 (COX-2) were immunohistochemically examined in both pelvic and extrapelvic endometriotic lesions. Different expressions of VEGF and COX-2 were observed in both…

A 34-year-old woman with a left ovarian cyst (clinically diagnosed as endometrial cyst) was treated with 400 mg of danazol per day. On the next day, after a total dose of only 600 mg of danazol, gingival bleeding and purpura occurred. Her l…

A 13-year-old nulligravida girl, 158.5 cm in height and 76.0 kg in body weight, came to our department complaining of continuous right lower abdominal pain. One month earlier, an ovarian cyst in the right ovary, about 3 cm in diameter, was …

It has been shown in mice that progesterone stimulates both mammary tumourigenesis and uterine adenomyosis in intact animals in the presence of normal levels of prolactin and oestrogen. From the view-point of the high dependence of progeste…