ANDREW McCullough has had scans this morning after injuring his elbow in the match against the Melbourne Storm last night.

As diagnosed, the scans have confirmed McCullough has damage to the medial ligament in his elbow.

"In good news, all tendons are intact and there are no fractures in his arm," said Broncos' High Performance Manager Jeremy Hickmans.

"While there is some muscle damage, it is secondary to the ligament damage.

"With an injury of this type he is expected to return to the field in four to six weeks."