Nationwide trends in and regional factors associated with minimally invasive hysterectomy for benign indications in Japan.

Objective: To examine the prevalence trends of minimally invasive hysterectomy for benign indications in Japan and investigate regional disparities.

Study Design: A retrospective cohort and ecological study using "The National Database of Health Insurance Claims and Specific Health Checkups of Japan (NDB) Open Data".

Setting: Nationwide Japan.

Inspection for micrometastasis is essential for predicting the prognosis of serous endometrial intraepithelial carcinoma: Case report and literature review.

Serous endometrial intraepithelial carcinoma is the precursor of invasive uterine serous carcinoma. Here, we present two cases of serous endometrial intraepithelial carcinoma with omental micrometastasis and discuss their clinical significance. Two menopausal patients with abnormal endometrial biopsy findings underwent hysterectomy and comprehensive surgical staging (bilateral salpingo-oophorectomy, omentectomy, and pelvic and para-aortic lymphadenectomy).