𝔖 Bobbio Scriptorium
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Origin of embryo-derived yolk sac carcinomas

✍ Scribed by Ivan Damjanov; Nikola Škreb; Stewart Sell

Book ID
102865724
Publisher
John Wiley and Sons
Year
1977
Tongue
French
Weight
556 KB
Volume
19
Category
Article
ISSN
0020-7136

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✦ Synopsis

Abstract

The origin of yolk sac carcinoma obtained from rat embryos transplanted to extrauterine sites was traced to the extraembryonic portion of 9‐day egg‐cylinders. Under appropriate conditions cells of the extraembryonic portion of the egg cylinder differentiate into cells of parietal yolk sac epithelium, continue to proliferate and form retransplantable malignant tumors. Serum concentrations of alphafetoprotein were elevated in rats bearing yolk sac carcinomas and in some animals bearing teratomas admixed with yolk sac carcinoma. Possible factors that regulate the survival and proliferation of yolk sac epithelium in extrauterine sites are briefly discussed.

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