Doctors at the Hospital of the University of Pennsylvania in Philadelphia were confident he would make a full recovery, so Pyett doesn't remember ever fearing for his life.
"The doctors and everybody I talked to were super positive," he said. "So, it really didn't cross my mind."
Pyett said he'll be forever grateful to the Philadelphia Flyers, Lehigh Valley's NHL parent team, who made sure he received the best treatment.
His mother still exchanges occasional texts with Flyers general manager Ron Hextall, who checked in often during his recovery.
"Here's a kid that's struggling with this diagnosis, and he persevered and pushed his way through it," Hextall said. "Quite honestly, I didn't think he'd ever play hockey again. I'm a little stunned. But it's a testament to the character of the kid that he's back playing hockey at a high level."
Pyett went through six cycles of chemotherapy over 18 weeks and five weeks of radiation before having surgery in May 2016. Prior to that complex procedure, which involved one surgeon removing the tumor and another repairing the blood vessels that were cut during the tumor removal, was one of the few times Pyett considered that his playing days might be over.
"My biggest fear was you wake up from surgery and there was a complication, something went wrong, and I'm missing my lower leg or something," he said. "It's a morbid thought and I was assured the chances of that were very slim, so I didn't worry about it a whole lot, but it definitely crossed my mind."