Objective : To determine simple clinical and biological factors that can improve the screening of hemostatic diseases at risk of hemorrhage in children.~Method:~Retrospective inclusion of all patients <18 years referred to the CRTH in pediatric consultation for the reason of exploration of a hemorrhagic syndrome or exploration of an anomaly in the hemostasis assessment.~Data collected (by collection in the medical file):~Patient data: Age, sex, personal and family history of hemorrhagic disease~Clinical data: hemorrhagic symptomatology (epistaxis, gingivorrhagia, etc.) Biological data: PT, TCK, factor assay, platelet function Medical data: complete diagnosis if diagnosis of hemorrhagic disease~Scores: HEMOSTOP, PBQ, ISTH, TOSETTO score~Analyzes: calculation of the Odd Ratio, AUC, Se, Sp, VPP, VPN for different clinical / biological factors and each score.
The investigators try to improve the screening of bleeding disorders in children by identifying symptoms, laboratory abnormalities and clinical scores discriminating patients congenital bleeding disorders in order to create a simple screening algorithm applicable in pediatrics, aiming for use in pre-anesthetic consultation and in consultation by pediatricians and general practitioners.