1. Department of Pathology, Saitama Medical University International Medical Center, Hidaka, Saitama 350‑1298, Japan
2. Department of Gynecologic Oncology, Saitama Medical University International Medical Center, Hidaka, Saitama 350‑1298, Japan
3. Department of Diagnostic Radiology, Saitama Medical University Hospital, Moroyama, Saitama 350-0495, Japan