How can you differentiate between cocaine-induced and ANCA-associated vasculitis? Dr Sander van Leuven joins Dr David Liew to discuss a recent case series analysis from centres in Birmingham and London. Sander is a consultant rheumatologist in Nejmegen, the Netherlands. He previously trained in London, where he conducted a 15-year retrospective study of cocaine-associated pseudovasculitis. Want to find out more? Here's your further reading list:Case series analysis from Gill et al.Sander's accompanying editorial (plus excellent graphic!)Sander's 2018 case series, published in Autoimmunity ReviewsThanks for listening to Talking Rheumatology Research! Join the conversation on Twitter using #TalkingRheumResearch, tweet us @RheumJnl, or find us on Instagram. Want to read more rheumatology research? Explore Rheumatology and Rheumatology Advances in Practice.