Large teratomas can lead to serious complications like ovarian torsion, which can cut off blood flow to the ovary and affect fertility. Here's what to know.

Savannah Stuthers, 20, "nearly vomited" when she saw pictures of the teratoma, and she felt horrified to learn what was growing inside her without knowing.

The teratoma was removed in its entirety, by which point it had grown to a 10x10 centimeter mass. Unfortunately, doctors also had to remove Stuthers' left ovary.