"What a year!" Lindblom's girlfriend, Alma, posted Tuesday on Instagram. "369 days ago we found out that Oskar had cancer, and today we got to know that the scans are clear after his second checkup."
Lindblom, 24, was leading the Flyers with 11 goals through 30 games before leaving the team after receiving the diagnosis last December.
The Swedish winger finished his treatments at Penn Medical Center on July 2 and was able to suit up for the Flyers in the postseason.
Lindblom averaged 17:06 of ice time over two games during the club's second-round series against the New York Islanders in September. He credited the support of his teammates for giving him the strength to return.
"It's been everything," he said, according to NHL.com's Adam Kimelman. "They talked to me like I'm still with the team even if I'm not there. Those tough weeks, when I felt so bad and trying to think about life and they'd call me, text me, help me get more energy. It helped me through the whole process."
The 6-foot-1 forward was a finalist for the Bill Masterton Memorial Trophy. The Flyers gave him a three-year, $9-million contract in July, just weeks after the end of his treatment.