ill (adj.): cool, tight, sweet, rad, awesome, bangin’. Compare “sick.”

It wasn’t long ago that I did some good hard thinking about funny disease names, and a recent reentry of herpes zoster into my greater circle of friends and acquaintances got me back on that train. I think the categories of amusing ailments break down roughly as follows:

1. Diseases that are funny because they’re named after nouns in the vernacular. For example, piles, shingles, the bends.
2. Diseases that are funny because they’re named after an amusing, if unfortunate symptom. For example, restless leg syndrome, whooping cough, overactive bladder syndrome, irritable bowel syndrome.
   
3. Diseases that are funny because they sound old-timey and silly. For example, rickets, pleurisy, scurvy, leprosy, dropsy.
   
4. Diseases that are funny because they sound old-timey and antiquated. For example, gout, consumption, cow-pox.
5. Diseases that are funny because they’re essentially fake ideas. For example, hysteria, the vapors, spells.
6. Diseases that are funny because, in a purely hypothetical situation in which certain disbeliefs and understandings of the ways things are named are suspended, their initial diagnoses must have been pretty hilarious. For example, Lou Gehrig’s disease.

Are there categories I’m missing? For the life of me I can’t think of any.