This document is a compilation of various studies, case reports, and guidelines related to testicular germ cell tumors. It includes information on the detection of recurrence in patients with stage I nonseminomatous testicular germ cell tumors, the use of surveillance as a treatment option, and the role of biomarkers in predicting disease recurrence. Additionally, the document discusses rare cases of testicular germ cell tumors metastasizing to the prostate and other extragonadal sites. It also provides information on the management and prognosis of testicular germ cell tumors, including the use of radiotherapy and surgery. [Extracted from the article]