Germ cell tumors

Topic Completed: 1 December 2012

Minor changes: 9 March 2020

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PubMed Search: Polyembryoma ovarian

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Cite this page: Ehdaivand S. Polyembryoma. PathologyOutlines.com website. https://www.pathologyoutlines.com/topic/ovarytumorpolyembryoma.html. Accessed August 11th, 2020.
Definition / general
  • Embryonal carcinoma composed primarily of embryoid bodies
  • Embryoid body has amniotic cavity-like structure and is continuous with intestinal duct, and rarely has squamous cell nests, while "yolk sac" is continuous with hepatic tissue
  • Embryoid body is not considered to be a real or teratomatous embryo, but a product of divergent differentiation into intestine and liver from the plastic epithelium, which seems to be derived from embryonic gut (Hum Pathol 1988;19:1144)
Microscopic (histologic) images

AFIP images

Several embryoid bodies in
different stages of development

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