Sydney youngster Tom McCartin has been given the all-clear following precautionary scans.

He copped a knock at training three weeks ago and suffered what the Swans said were “symptoms that required further investigation”.

An MRI revealed a concern about possible damage to an artery in the 19-year-old’s neck.

But in pleasing news, a further investigation revealed the abnormality was something McCartin was born with.

Specialists said it would have no impact on his playing prospects moving forward.