Teams: Derby County, Burton Albion
The Scottish midfielder faces three months on the sidelines having made only five appearances for his new club.
He arrived as a free agent early last month after negotiating his release from Glasgow Rangers shortly before the transfer window closed.
Rams boss Billy Davies billed Malcolm as the player to add bite to the Rams' midfield and he did just that during an impressive debut in a 1-0 win at Wolverhampton Wanderers.
But he suffered a knock on his ankle in the next fixture against Preston North End in the middle of September.
"It didn't feel that bad at first and I thought if I just kept going it would go away, but it ended up being more serious than I thought," said the 25-year-old.
Malcolm played the first half against Doncaster Rovers in the Carling Cup and was used for a few minutes as a late substitute in the victory at Sheffield Wednesday.
He started the comfortable home win against Southend United and thought the ankle would clear up during the two-week international break, but he broke down in training ahead of the Plymouth Argyle game earlier this month.
"That's when I started fearing the worst. The ankle was no better," said Malcolm.
A piece of floating bone was causing the pain and it was hoped that keyhole surgery could locate and remove the offending debris, but this was not possible.
The piece of bone had lodged itself in the joint and the surgeon had to go into the ankle to take it out.
The operation took place in Wrexham on Wednesday afternoon before Malcolm left hospital in the evening and was driven back to Derby by club physio Andrew Balderston.
"I have never had an injury as bad at this. I'd never had an operation for a football injury," said Malcolm.
"It's a bitter blow because I signed, played the first few games and did OK and now I've got injured.
"That's disappointing but I won't let it get me down.
"I'll work hard to get back. The specialist says three months but if everything goes well then, hopefully, I can get back a little bit sooner but I'll go with whatever the medical people say.
"I am determined to bounce back and prove I can do a job. I want to repay the gaffer because he has brought me down here to play for Derby County.
"Footballers don't like being injured but I'll be there supporting the lads whenever I can, heading and kicking every ball in the stands. As a player, you just want to get fit again, get back in the side and prove you deserve to be there.
Originally Posted by Nico
I dont belive in jinxing mate, I do belive in playing at home with a 2-0 advantage against a team which I cant see scoring 2 goals!
Of course, if we lose, I'll never admit it was me who wrote this.
Forest 2-5 Yeovil aet
Brian Clough - Legend!