ABSTRACT
To aid in clinical dierentiation, arteritis may be classied by the size of the involved vessel. One such nomenclature system is adopted from the 2012 Chapel Hill Consensus Conference (CHCC; see Table 44.1 and Figure 44.1).1 ere is, however, substantial overlap among dierent vasculitides, and the type of vessel involved is merely one of many features that must be assessed before a diagnosis can be rendered. Furthermore, all three major categories of vasculitis can aect any size artery.1
