UMMS Affiliation

Department of Radiology

Publication Date


Document Type



Female Urogenital Diseases and Pregnancy Complications | Radiology


Ectopic pregnancy is the implantation of a fertilized egg outside the uterine endometrial cavity. For women presenting to the emergency department with abdominal pain and/or vaginal bleeding, ectopic pregnancy is an important diagnostic consideration. The diagnosis is made based on laboratory values and ultrasound imaging findings. The ultrasound appearance of both normal early pregnancy and ectopic pregnancy are variable and often subtle, presenting diagnostic challenges for radiologists. This pictorial essay describes and illustrates the sonographic findings of ectopic pregnancy and reviews the differential diagnoses that can mimic ectopic pregnancy on ultrasound. With the possibility of medical management, the value of early detection and prompt initiation of treatment has increased in improving clinical outcomes and preventing the complications of ectopic pregnancy.


Diagnosis, differential, Methotrexate, Pregnancy, ectopic, Ultrasonography

Rights and Permissions

Copyright © 2017 Korean Society of Ultrasound in Medicine (KSUM). This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted noncommercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

DOI of Published Version



Ultrasonography. 2017 Aug 19. pii: usg.17044. doi: 10.14366/usg.17044. [Epub ahead of print] Link to article on publisher's site

Journal/Book/Conference Title

Ultrasonography (Seoul, Korea)

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Link to Article in PubMed

PubMed ID


Creative Commons License

Creative Commons Attribution-Noncommercial 3.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial 3.0 License