Preschool teacher donates kidney to save 4-year-old student

A mother is thanking a preschool teacher donating a kidney to save her 4-year-old daughter’s life.

Four-year-old Lyla was diagnosed with microscopic polyangiitis in October 2015. The disease can can cause organ damage. Her family has been waiting for months to find a kidney donor.

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Earlier this month, teachers the Kids Express Leaning Center in Madison, Wisconsin, planned the big surprise for mom Dena Carreyn, who showed up for a parent-teacher conference. She was sitting down with Lyla's teacher, Beth Battista, when she got the good news, which she later shared in a Facebook post.

A video posted to Facebook shows the touching moment. Battista handed Carreyn a short letter that read, "I may just be her teacher now, but soon a little piece of me will be with Lyla forever. I'm Lyla's kidney donor."

Carryen immediately broke down in tears, hugging Battista and thanking her.

Watch the heartwarming  moment in the video below.