Definition: 'Endodermal Sinus Tumor'
endodermal sinus tumorType: Term
1. a malignant neoplasm occurring in the gonads, in sacrococcygeal teratomas, and in the mediastinum; produces α-fetoprotein and is thought to be derived from primitive endodermal cells.
Synonyms: yolk sac tumor
The definition information for endodermal sinus tumor is provided by Stedman's. You can search our medical dictionary here.