Texas Tech University School of Veterinary Medicine 1 article published in JoVE Cancer Research Non-Invasive Ultrasound Assessment of Endometrial Cancer Progression in Pax8-Directed Deletion of the Tumor Suppressors Arid1a and Pten in Mice Rachel Vistein1, Briana Winer2, Stephanie Myers1,3, Juliane Liberto4, Shun Ishiyama1,5,6, Xin Guo1, Harumi Saeki7, Tian-Li Wang4,8, Ie-Ming Shih2,4,8, Kathleen Gabrielson1,4,8 1Department of Molecular and Comparative Pathobiology, Johns Hopkins University School of Medicine, 2Department of Obstetrics and Gynecology, Johns Hopkins University School of Medicine, 3Texas Tech University School of Veterinary Medicine, 4Department of Pathology, Johns Hopkins University School of Medicine, 5Department of Surgery, Johns Hopkins University School of Medicine, 6Department of Coloproctological Surgery, Juntendo University School of Medicine, 7Department of Human Pathology, Juntendo University School of Medicine, 8Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University This protocol describes a method for monitoring the progression of morphological changes over time in the uterus in an inducible mouse model of endometrial cancer using ultrasound imaging with correlation to gross and histological changes.