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Medical Term:

endodermal sinus tumor


a malignant neoplasm occurring in the gonads, in sacrococcygeal teratomas, and in the mediastinum; produces a-fetoprotein and is thought to be derived from primitive endodermal cells.

Synonym(s): yolk sac tumor

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.