SONOMA, Calif. - A Sonoma teenager is presenting a $10,000 check to a specialized research team at Stanford after she credited the team for saving her mom’s life.

What we know:

Lani Delorefice, 18, is a senior at Sonoma Valley High School who is part of the Future Farmers of America , FAA.

For the last seven years, she said she has been raising livestock, but this past August, she sold her steer to raise money for brain tumor research.

Her mother, Rebecca, is now recovering from intense brain surgery to remove a large tumor, is a beneficiary of Stanford’s care.

She sold her steer at the Sonoma County Fair for the well above market price of $20,000.

"It was a hefty $5,000 a quarter per buyer for maybe 300 pounds of meat," said Lani.

She said she’s giving half of those earnings to

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