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  • embryonal
  • Malignant transformation of these cells, whether induced by a virus or spontaneously occurring in the displaced yolk sac, leads not only to the development of yolk sac carcinomas and eventually embryonal carcinoma but also, although rarely, to choriocarcinoma. (ehu.es)
  • eggs
  • Yesterday was 21 days and 3 out of 28 eggs hatched - one has about a pea sized bubble of yolk sac sticking out and the other 2 appear normal. (backyardchickens.com)
  • The diet of Baltic salmon leads to thiamine deficiency in eggs and consequently to the mortality of yolk-sac fry: The main prey species of the Baltic salmon are sprat (Sprattus sprattus) and herring (Clupea harangus membras). (wikipedia.org)
  • arise
  • Instead the stem cells are multipotential cells that arise in the displaced yolk sac by a process of dedifferentiation. (ehu.es)
  • Endodermal sinus (yolk sac) tumors (ESTs) are rare neoplasms that most commonly arise in the ovaries or testis. (urotoday.com)
  • usually
  • it usually means chromosomal abnormailities and the sac is taking all the nutrients so baby can not grow. (whattoexpect.com)
  • early
  • 1 - Amniotic cavity 2 - Yolk-sac 3 - Chorion Diagram illustrating early formation of allantois and differentiation of body-stalk. (wikipedia.org)
  • rare
  • Although highly malignant when treated promptly with surgery and chemotherapy, death from testicular yolk sac tumours is exceedingly rare. (sciencephoto.com)
  • develop
  • Whether virus induced or not, the yolk sac carcinomas that develop from the displaced visceral yolk sac possess the same morphological and biological characteristics. (ehu.es)