These tumors typically express high levels of alpha-fetoprotein (AFP). Germ cell tumors are most common in children and young adults, there are different sub-types including endodermal tumors (mostly found in children), dysgerminoma, teratoma, and seminoma (young men). The most common location of these tumors are the ovaries (in females) or testicles (in males). However, they can also develop in other... Read More