Placenta
Placental gross / microscopic abnormalities, nonneoplastic
Accessory (succenturiate) lobe


Topic Completed: 1 September 2011

Revised: 15 February 2019

Copyright: 2002-2019, PathologyOutlines.com, Inc.

PubMed Search: Placenta accessory lobe OR succenturiate lobe
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Cite this page: Ziadie MS. Accessory (succenturiate) lobe. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/placentaaccessory.html. Accessed February 18th, 2019.
Definition / general
  • One or multiple accessory lobes connected to the main disc by blood vessels that are at risk for hemorrhage and thromboemboli
  • Seen in 3% of placentas
Etiology
  • Due to focal noninvolution of chorionic laevae
Gross description
  • Main placental disc is attached to a smaller portion of placenta by fetal vessels and membranes
Gross images

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Accessory lobe