Israel Folau fears he could be out of action for as long as six months because of his throat injury.
Folau was controversially pulled out of the Waratahs match against the Western Force by the Australian Rugby Union, despite his Super 15 team's medical staff clearing him to play.
The Australia star admits he is angry about the decision, and is worried that he may not be able to play for the rest of the season.
"Obviously I'm very disappointed and frustrated at this stage, but the ARU have made a decision and I'm not happy with it," Folau told Fox Sports.
"I'm very confused at this stage. I've spoken to (Waratahs team doctor Sharron Flahive) and the specialist that I've seen here in Perth this week.
"They said that I was good to go, with the risk that I was well aware of, but obviously the ARU have stepped in and I'm very disappointed. I haven't had any contact with the ARU medical staff this whole week.
"In this whole situation I think I'm the most important person they've got to contact and I haven't spoken to any of them, so in terms of that, I'm very disappointed."
Folau said he could be out until October. "I am going on the advice that the specialists have said to me: "If you want to make it 100 per cent, it potentially could take that long."