<prompt> Pile of plates appearance on angiography suggests diagnosis ofAtherosclerosisFibromuscular DysplasiaTakayasus DiseaseMoya Moya disease  <response>: Angiography: string of beadsPile of plates appearance of FMD is classically seen on angiography. Fibromuscular dysplasia most commonly causes small stenoses along a vessel with intervening areas of dilatation small aneurysms, creating a string of beads appearance. Less commonly the stenosis has a smooth tapered appearance. Fibromuscular dysplasia also weakens the vessel wall which predisposes to dissection ref Robbins 9e pg 678 