Multimodality imaging of the essure permanent birth control device: emphasis on commonly overlooked abnormalities

The purpose of this pictorial essay is to review the imaging findings of normally and abnormally positioned Essure permanent birth control devices across the different imaging techniques and to show common sites of device migration. The Essure device is easily visualized on all imaging techniques, and radiologists should be familiar with its appearance and be able to identify cases of device migration on ultrasound and hysterosalpingography that would suggest malfunction.