Placenta
Umbilical cord
Supernumerary vessels

Author: Mandolin Ziadie, M.D. (see Authors page)

Revised: 18 October 2017, last major update November 2011

Copyright: (c) 2002-2017, PathologyOutlines.com, Inc.

PubMed Search: Supernumerary vessels umbilical

Cite this page: Ziadie, M. Supernumerary vessels. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/placentasupernumerary.html. Accessed October 22nd, 2017.
Definition / general
  • Four or more umbilical cord vessels due to an extra artery or vein
  • May be associated with fetal anomalies and maternal smoking
  • Thought to originate from persistent umbilical veins or vitelline vessels
Gross description
  • Looping may cause artifactual supernumerary vessels and should be excluded on gross examination