@cannahhurtis Appreciate clarification on sourcing re: our guidelines. Looking at AMBOSS and card history this was changed to small/medium muscular arteries semi-recently based off AMBOSS’ pathophysiology section for FMD (see here if you have access: https://next.amboss.com/us/article/3R0S5f?q=fibromuscular%20dysplasia#ZScZyb0). Seems to be an instance where Pathoma has got it wrong