Record number: 889Adverse Occurrence type: Vasovagal reactionsMPHO Type: ApheresisEstimated frequency: UncommonAlerting signals, symptoms, evidence of occurrence: SyncopeDemonstration of imputability or root cause: Probable/possibleKeywords: syncopefaintingPBSC (peripheral blood stem cells)apheresisdonor reactionallogeneicReferences: World Marrow Donor Association. SEAR Registry, 12th ed.Moderate and severe adverse events associated with apheresis donations: incidences and risk factorsRecovery and safety profiles of marrow and PBSC donors: experience of the National Marrow Donor Program.World Marrow Donor Association. Clinical Working Group (S(P)EAR committee). Minneapolis 2012