I would pull it, unless it was extremely special and if it was special I would isolate it. If it never had that mottled pattern before, I would tend to lean toward virus.
Name: Lily Martagon Du Page County Illinois (Zone 5a)
I have never seen this pixelation in my older lilies. This lily is a new addition to the garden and another new lily from a different vendor showed this sign also. I will certainly pull them out just to be on the safe side. Thanks.