AKT-4996

AKT-4996

A 25-year-old man presents to your clinic with a complaint of a swelling on his right wrist. He suspects it may be scar tissue from an old injury and has been present for approximately two years, but over the past six months, it has been gradually increasing in size.

Upon examination, you note a discrete swelling on the dorsal surface of his right wrist, measuring about 4 cm in diameter. It is firm but mobile to palpation and non-tender. There is no associated skin discoloration or increased vascularity.

What characteristic of the swelling would prompt you to urgently refer for investigation of a possible sarcoma?