Germ cell tumors
Germ cell tumours, as the name suggests, derive from the germ cells found within the gonads (the ovaries and testicles). When they occur outside the gonads, it is due to birth defects during embryonic development.
They are the most common solid tumours in men of 20-35 years of age. Regarding women, more than 60% of childhood ovarian tumours derive from these cells. Both in patients with testicular tumours and in the ovaries, a high blood concentration of alpha-fetoprotein and the human chorionic gonadotropin hormone (HCG) is found.