Athletic youngster Andrew Tod is awaiting results of a scan after he was substituted with a knee injury whilst playing for their reserve team on Tuesday.
The 18-year-old, who is currently on loan to League Two promotion chasers East Fife, went down within the opening minute of their SPFL Reserve Cup win over Dundee United.
Post-match, John McLaughlan, head of professional development within the club's academy, said he "saw him opening his knee up, so it looks a bad one", but added he was hopeful of good news.
Tod, whose dad, Andrew senior, made almost 400 appearances for the Pars over two spells, has played five times for ex-Dunfermline boss Dick Campbell's Fifers, scoring once, since moving to Methil on a season-long loan in September.
Speaking ahead of today's Scottish Cup tie at Edinburgh City yesterday afternoon, Pars manager, James McPake, said: "We're waiting on the scan results.
"He got scanned on Wednesday, so we should have had them back. We've not, but I'm sure I'll have those results today at some point, or the medical department will. I don't get them, but I'll get told about them.
"Hopefully not as bad, but I'll wait on the scan result, and hopefully there's a wee bit of luck there for Andrew as well that it's not as bad as we thought up at Gussie Park at the time.
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"Fingers crossed, but we'll know more hopefully by close of play today.
"I feel for him, I do. The one last year (a knee ligament injury) was really problematic to him and it took a while, and then you think right, that's good, he's done all the work in the gym again, which is why sometimes I come out and say injuries at a young age aren't the worst things in the world.
"They feel like that at the time, but it gives you that chance to work yourself in the gym and get your body right, and Andrew's certainly done that.
"The only way you don't get that injury is if you don't go in for that tackle. Andrew went in for it, and these things at times can happen inside of the knee, so we're hopeful that it's not too bad.
"But, again, regardless of the extent of it, we'll get him right, we'll support him, and we'll get him back. I was hoping this loan was the kind where he went out and got the games.
"He's done great in the games he has played, but this injury will obviously set that back a wee bit, but he's still going to be a big player for this football club."
Meanwhile, McPake has said he remains hopeful that forward Lewis McCann will be fit to feature in the capital, but there is a doubt over Chris Kane.
The 30-year-old, who has scored four goals so far this season, picked up a calf problem in training, but McPake emphasised that it was not a serious issue.
McCann, meanwhile, missed the weekend defeat at Ayr United with a hamstring injury.
"We're hopeful with Lewis. He did a bit more today," McPake added.
"Chris Kane's picked up a calf injury on Wednesday in training, so we're assessing that. He didn't train yesterday, he did minimal stuff today, so we'll see if he can make it in time.
"It's not severe, it's not bad, but it's a niggle in the calf which has been problematic for him. We'll assess that again tomorrow, but hopefully we'll have both of them."
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