JACKSONVILLE, Fla. (CBS Tampa) — A 12-year-old girl got a 20-pound tumor removed after bullies at school teased her about being pregnant.

Janet Roberts told First Coast News that her daughter was being mercilessly bullied by students at school after her stomach began to grow.

Roberts gave her daughter multiple pregnancy tests after school officials informed her of the harassment, but they came up negative.

“I tested her every two weeks and it was negative,” Roberts told First Coast News. “Then I said, ‘If you’re not pregnant, something is going on here.’”

This past August, Roberts’ daughter was rushed to Wolfson Children’s Hospital after doctors found a massive tumor growing in her stomach.

“It was … 20 pounds in size,” Roberts explained to First Coast News. “But because of her size, they had to drain 2-liter bottle of it before they could pull it out of her.”

The tumor turned out to be benign, but the girl is in counseling to help deal with the bullying she endured.

“She has a hard time dealing with what happen to her,” Roberts told First Coast News. “She’s writing notes about what happened and how the people treated her.”