Akihiko Sekizawa

Background: Assisted reproductive therapy (ART) has been utilized as an effective therapeutic strategy for addressing infertility worldwide, and one of the key determinants of ART success is the acquisition of high-quality embryos through i…

ObjectiveThis study aimed to clarify the relationship between fluctuations in uterine stiffness during the third stage of labor and blood loss upon placenta delivery using shear wave elastography.MethodsThis prospective cohort study enrolle…

Background: A tubo-ovarian abscess (TOA) is an inflammatory mass involving the fallopian tube, ovary, and occasionally the other adjacent pelvic organs. These abscesses are found most commonly in women of reproductive age and are typically …

To probe the mechanism of the development of ovarian cancer from endometriosis, which is a multistep process that involves the activation of oncogenes and inactivation of tumor suppressor genes, we evaluated p53 mutations in solitary endome…

Ovarian clear-cell carcinoma (OCCA) and ovarian endometrioid carcinoma (OEMC) are often associated with endometriosis. This study determined the immunohistochemical expression of steroid hormone receptors and cancer-related genes in OCCA an…

Endometriosis shares some features characteristic of malignancy; however, it remains unclear whether endometriosis is a precursor to malignant disease. The objective is to determine the genetic relationship between endometriosis and ovarian…

OBJECTIVES: To clarify the role of specific genetic alterations in the multi-step process of malignant transformation of endometriosis. METHODS: In cases of ovarian endometrioid carcinoma, we separated regions of normal endometriosis, atypi…

Endometriosis is considered to be a possible precancerous disease. Pathologically, we observed malignant transformation of endometriosis to clear cell carcinoma or endometriotic carcinoma of the ovary, via the step of atypical endometriosis…

Several genetic alterations have been associated with the malignant transformation from endometriosis to ovarian cancer. However, the role of each genetic alteration in this multi-step process of tumorigenesis has not been clarified. Region…

ObjectiveAlthough ovarian clear cell adenocarcinoma (OCCA) and ovarian endometrioid adenocarcinoma (EC) are considered to be closely related to endometriosis, the mechanisms of carcinogenesis of these two malignancies and malignant transfor…