title: The puff of smoke sign.
authors.affiliation: Department of Diagnostic Imaging, the Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada. clara.ortiz@calgaryhealthregion.ca
authors.forename: Clara L
authors.initials: CL
authors.lastname: Ortiz-Neira
mesh_terms: D002533:Cerebral Angiography; D003097:Collateral Circulation; D003937:Diagnosis, Differential; D006801:Humans; D009072:Moyamoya Disease / Q000000981:diagnostic imaging*