“…21,32,39 Therefore, pathological investigation of the tu mor sample is mandatory before initiation of therapy, especially because there is a choice between surgical and nonsurgical treatment options. 5,11,14,18,21,27,31,32,36,39,41 Although less differentiated tumors such as germinomas are usually highly sensitive to NAT with no need for surgical intervention, 20,21,32 pure mature teratomas, arising from the differentiated cells of the embryonic tridermal plate, are known to respond poorly to NAT, and microsurgery alone can be curative. 5,9,14,25 With an overall 10-year survival rate of 92%, germinomas and mature teratomas belong to the good prognosis group in the classification of Matsutani and colleagues, 32 while secreting lesions typically have a very poor outcome with < 30% of a 3-year survival rate when NAT protocols are followed.…”