The 28-year-old is pushing for a recall to action earlier than expected having picked up the problem in the first week of January.
Speaking ahead of Saturday's FA Cup fourth round trip to Southend, McShane is enthusiastic about the possibility of appearing at Roots Hall.
McShane told the club's official website: "It's all about taking your chance when it comes and hopefully I can do that.
"It all feels okay on the training pitch and it's good to be back available again. The ankle feels fine and I've been back in training for a week now.
"I'm looking forward to the Southend game and hopefully I can play some part in that."