The donor was anonymous, as per the Organ Procurement and Transplantation Network's policy. (OPTN is part of the federal Department of Health and Human Services.)
But a few hours after the liver transplant, Adam had to go under the knife again, this time to remove a blood clot in his brain, which Mazariegos said was an indirect cause of his liver failure. The compromised organ rendered his blood unable to clot, causing him to bleed more than a healthy person when doctors implanted the catheter to monitor brain swelling. After surgery, the blood clotted around the catheter.
"Keep Praying" the Facebook page post read as Adam went into surgery again Saturday night.
Linda Snow estimates that her son has 200 stitches in his head because she counted to 50 and gave up.
"This kid has a lot of nice scars that he can talk about," she said, laughing.
But today, doctors removed Adam's ventilator, allowing him to speak for the first time in days.
"We actually got a couple smiles out of him," Adam's brother, Christopher Snow, told ABCNews.com on the phone as he left Adam's room. "I'm absolutely on cloud nine."
Adam's hospital stay will cost hundreds of thousands of dollars, Linda Snow estimates, because one medication cost $10,000 per dose. Mazariegos said he didn't know what the final bill would be or what portion would be covered by the Snow's insurance, but said from experience that treatments and recovery could be expensive.
Christopher Snow helped set up the Adam Snow Benefit Fund to receive donations to help his parents pay for his Adam's treatment. Donors can contribute to the fund on PayPal or contact NexTier Bank in Pittsburgh for more information.
"We're very hopeful that he'll have an excellent quality of life," Mazariegos said. "The most important thing to ensure that was he was able to get a timely transplant, and he's doing well from that."