Quebec Platelet Disorder Watchlist (log in to enable) Retrieved 2021-01-23 Source Orphanet Trials — Genes PLAU, PLG, CD34, THBS1, VCL, PRAP1, C10orf55 Drugs — Interested in hearing about new therapies? Registered! Quebec platelet syndrome (QPS) is a platelet granule disorder characterized by moderate to severe bleeding after trauma, surgery or obstetric interventions, frequent ecchymoses, mucocutaneous bleeding and muscle and joint bleeds.