There were emotional scenes during Wednesday's AFL training session at Arden St as the Kangaroos squad was treated a drop-in by club great Ben Cunnington. 

Cunnington delighted his teammates and coach David Noble by joining the squad after undergoing a nine-week course of chemotherapy to treat a secondary cancer.

"I've finished my course of treatment and was feeling well enough to drop in and say g'day," Cunnington said.

"I've had such amazing support from everyone at the club and I can't thank them enough."

Cunnington, who has played 227 games for the club, had surgery in July after the discovery of a testicular tumour. A routine post-surgery medical check-up detected the secondary cancer in November.

He is receiving the club's full support as he continues his journey towards a full recovery.