Stop Saying "Cornual Pregnancy": Eccentric IUP vs Interstitial EP on TVS & 3D Ultrasound

How do you tell an eccentrically located intrauterine pregnancy from an interstitial ectopic pregnancy, and which words should go in your report? This video walks through two real cases on 2D transvaginal and 3D coronal ultrasound. It sets them against the 2024 Society of Radiologists in Ultrasound (SRU) First-Trimester US Lexicon, which is endorsed by ACOG, AIUM, SMFM, ACR, ASRM and others. Key points: • IUP = a pregnancy implanted in a normal location. EP = a pregnancy implanted in an abnormal location, whether extrauterine or intrauterine. • A gestational sac that is off the midline but completely surrounded by endometrium is an IUP. Report it simply as "intrauterine pregnancy". • Interstitial EP signs: intervening myometrium, myometrial claw sign, interstitial line sign, no sliding sign, and a 3D coronal view. • Terms to avoid: 'angular pregnancy', 'cornual pregnancy', 'eccentric pregnancy', 'cornual EP', 'bicornuate/unicornuate pregnancy', 'live/viable EP'. Reference: Rodgers SK, Horrow MM, Doubilet PM, et al. A Lexicon for First-Trimester US: Society of Radiologists in Ultrasound Consensus Conference Recommendations. Radiology 2024;e240122 (doi:10.1148/radiol.240122) and Am J Obstet Gynecol 2024 (doi:10.1016/j.ajog.2024.07.038). Dr. Raju V. Giraddi, Consultant Sonologist & Fetal Medicine Specialist, Bettadur Super Speciality Hospital, Raichur. For medical education only. Patient identifiers have been removed. Tags interstitial ectopic pregnancy, eccentric intrauterine pregnancy, cornual pregnancy, angular pregnancy, SRU lexicon, first trimester ultrasound, ectopic pregnancy ultrasound, 3D ultrasound uterus, transvaginal sonography, early pregnancy ultrasound, interstitial line sign, myometrial claw sign, OBGYN, fetal medicine