<prompt> Predisposing features for germ cell tumour-a Cryptorchidismb Testicular feminising syndromec Klinefelters syndromed Smokinge Right side more common than Left sidebcdeabcdabceabde  <response>: The predisposing factor of germ cell tumors of testes are :CryptorchidismTesticular feminisation syndromeKlinefelter syndromeExcess 12P copy number either in the term of i 12P or increased 12P an aberranthy banded marker chromosome.In most large testicular tumour approximately 10 associated with Cryptorchidism.Abdominal cryptorchid testes are higher risk than inguinal cryptorchid testes.Early orchiopexy before puberty reduced the risk of GCT.Klinefeleters syndrome is associated with mediastinal GCT.An ischromosome of short arm of chromosome 12. is pathognomic of GCT in all histological types 