There’s at least 20 different types of vasculitis. We won’t go through all of them, but we’ll definitely hit some of the most common ones which you should be familiar with for the boards and the wards. As always, it’s about having a good mental map to organize the diseases into different classes. We’ll classify vasculitis based on small, medium, and large vessel diseases and try to help ingrain concepts with some silly mnemonics and a rapid-fire review at the end. Don’t worry if it doesn’t stick right away! Practice makes perfect.