Health / Medical Topics |
Choristoma
Proliferation of normal tissue in an anatomic site in which this particular type of tissue is not normally present. (NCI Thesaurus)
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Tiny vascular tissue projections from the membranous sac that surrounds the embryo.
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The extraembryonic membranous sac surrounding the embryo of amniote vertebrates.
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The outermost layer of the membranous sac enclosing the embryo in higher vertebrates.
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