AFP and teratoma: Necrosis/fibrosis was significantly more likely to be identified in post-chemotherapy residual masses when compared with teratoma or viable GCT when AFP (OR 3.22, 95% CI 2.49-4.15) (15, 17, 28, 30, 37, 40, 42) or bHCG (OR 1.96, 95% CI 1.62-2.36) (15, 17, 28, 33, 37, 40, 42) were normal at the commencement of chemotherapy.