What are Tertiary Lues?

I learned that when a physician examines an insane patient they always check for evidence of “tertiary lues”, a clue to the root cause of nutty behavior.

Evidently, crazy people with syphilis develop these tertiary lues, a visual clue to the root cause of schizophrenic behaviors.



In WWII, Syphilis and gonorrhea was a major concern, and I love the old WWII VD posters:



Syphilis was one rare, but this fatal form of crotch rot is making a comeback:



So what do tertiary lues look like?

Click the link for an image search for tertiary lues if you dare . . . .