That looks like an Erie sheephead from 20 yrs ago. The tumors seemed to disappear after the zebra muscles cleaned up the lake. Drum have a tenancy to form tumors without much irritation/pollutants. That may have been a result of a previous hook puncture. Lamprey eel scars usually result in a nasty tumor for a drum as well
Fun to catch, but I'd starve before I ate one.