Tubal obstruction (extrinsic) Tubal obstruction (extrinsic). A: Initial distention of the lumen without tubal spill. B, C: Bilateral cornual fibroids (between cursors) probably caused this. Source: TRANSVAGINAL SONOGRAPHY IN GYNECOLOGIC INFERTILITY, Sonography in Obstetrics and Gynecology: Principles & Practice, 7e Citation: Fleischer AC, Toy EC, Lee W, Manning FA, Romero RJ. Sonography in Obstetrics and Gynecology: Principles & Practice, 7e; 2014 Available at: https://obgyn.mhmedical.com/DownloadImage.aspx?image=/data/books/1414/fle_ch37_f010c.png&sec=76396395&BookID=1414&ChapterSecID=76396319&imagename= Accessed: October 31, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved