Yolk sac tumor

Last revised by Dr Yuranga Weerakkody on 15 Jun 2022

A yolk sac tumor (YST) (or an endodermal sinus tumor) is a type of malignant germ cell tumor.

Epidemiology

They usually develop in infants, young children, and young women 1

Pathology

They are non-epithelial tumors of germ-cell origin.

Location

They occur variable sites with the ovary being the commonest

Serological markers

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Cases and figures

  • Case 1: mediastinal yolk sac tumor
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  • Case 2: testicular yolk sac tumor
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  • Case 3: ovarian yolk sac tumor
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