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Dorchester Center, MA 02124
Yolk Sac Tumor
D efinition —A malignant germ cell tumor with endodermal sinus or vitelline differentiation.
Clinical Features
Epidemiology
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The majority of patients are in their teens or twenties, although cases commonly occur in the first and fourth decades of life as well. The mean age is 19 years.
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Yolk sac tumors are the second most common malignant germ cell tumor (dysgerminoma is the most common) but are relatively rare overall.
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