Which chemo regimen, if any, would you use as adjuvant treatment in a young patient with primary malignant thyroid teratoma?   

There is no evidence base to guide you here. The term "malignant teratoma" is not particularly helpful here and does not distinguish between benign teratoma, somatic transformation, or active germ cell malignancies. If classic markers AFP and HCG are significantly elevated, that would favor a malign...