ON THIS PAGE: You will find out more about the factors that increase the chance of developing this type of tumor. To see other pages, use the menu.
A risk factor is anything that increases a person’s chance of developing a tumor. Although risk factors often influence the development of a tumor, most do not directly cause a tumor. Some children with several risk factors never develop a tumor, while others with no known risk factors do.
The following factors may raise a child’s risk of developing an extracranial germ cell tumor:
Cryptorchidism. If a boy has an undescended testicle, he has a higher risk of developing a testicular seminoma tumor. To learn more, see the full guide to testicular cancer  on another part of Cancer.Net.
Turner syndrome. Turner syndrome is a genetic condition in which a girl is born with a missing X chromosome. Girls with this condition have a higher risk of developing a gonadoblastoma, a benign tumor that can eventually turn into cancer.
Androgen insensitivity syndrome. Androgen insensitivity syndrome is when a person who is genetically male, with 1 X and 1 Y chromosome, is resistant to male hormones called androgens. A person with this syndrome has a higher risk of developing a gonadoblastoma or other germ cell tumors.
The following factor may raise a person’s risk of developing an extracranial, extragonadal germ cell tumor:
Klinefelter’s syndrome. Men with this genetic condition are born with an extra X chromosome. Klinefelter’s syndrome is connected to a higher risk of a germ cell tumor in the chest.
The next section in this guide is Symptoms and Signs . It explains what body changes or medical problems this disease can cause. Or, use the menu to choose another section to continue reading this guide.