The forward was diagnosed with Ewing's sarcoma, a form of bone cancer, in December.
"He's working extremely hard right now to get back to game shape and game conditioning after what he went through," Philadelphia coach Alain Vigneault said. "Obviously we can't talk about who's in and who's out, but he's working extremely hard, and I think everybody was happy to have him around the team and on the ice tonight."
The Flyers lost 3-2 and can be eliminated in Game 5 on Tuesday (7 p.m. ET; NBCSN, CBC, TVAS). Teams trailing 3-1 are 29-284 (9.3 percent) winning a best-of-7 Stanley Cup Playoff series, including 0-6 in the first round this season.
Lindblom last played Dec. 7, and his diagnosis was announced Dec. 13. Lindblom completed his treatment July 2 and joined the Flyers in Toronto, the East hub city, on Aug. 11. As part of the NHL Return to Play Plan, a team is not permitted to disclose player injury or illness information.
"He's getting closer to coming back," Philadelphia forward Sean Couturier said. "It's nice to have him around us. Such a great guy, and what he's been through, he's done a heck of a job just being positive and keeping a good attitude. Having that around us just reflects on us. We're excited to have him around."