A year ago, Sydney donated bone marrow to cure Mayate of a rare blood disorder that required monthly transfusions.
Both were overcome with emotion.
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"It's so great that she could come out here and that she gave her bone marrow to me," Mayate said.
"I didn't even think about how big or important it was until I Face-timed with her and that was really powerful," she said.
Finding a marrow donor is rare. Family members are a match only 30 percent of the time.
Ethnicity matters. Both Mayate and Sydney are Filipino.
Sydney says she registered as a potential donor on a whim.