The Kangaroos feared Adams had sustained a serious injury to his left shoulder against Melbourne on Saturday, in what coach Brad Scott said could be a devastating blow to the team.
But football manager Donald McDonald said on Monday that scans had cleared the midfielder of major damage, although they would continue to assess him during the week.
"It's not really clear, but the good thing is it's not as serious as what we first thought, so it's not as major as requiring a reconstruction," McDonald told Melbourne's SEN radio.
"There's a little bit of damage there, but it mightn't even be enough for him to miss this week."
Adams had the shoulder reconstructed last year.
"Hopefully he's just damaged a bit of scar tissue and with the right type of physio he might come up," McDonald said.
"But we're just going to wait and see how he tracks throughout the week."
Adams had a right shoulder injury aggravated 15 days earlier in a chicken wing tackle from Carlton captain Chris Judd, for which the Blues star received a four-match suspension.
But Adams did not miss any games as a result of that incident.