Venous thrombosis results from blood coagulation in veins, most frequently in the deep veins of the leg. Risk factors for venous thrombosis may be environmental or genetic; in most cases venous... Show moreVenous thrombosis results from blood coagulation in veins, most frequently in the deep veins of the leg. Risk factors for venous thrombosis may be environmental or genetic; in most cases venous thrombosis occurs after an environmental trigger on a background of increased susceptibility. This thesis describes research into the genetic variability that determines why some are more prone to develop venous thrombosis than others. Known genetic variants and the family history of venous thrombosis were evaluated as risk factors, and new variants were identified in a large association study of thousands of single nucleotide polymorphisms. Finally, the possibility of genetic profiling was explored, making use of known and newly identified genetic variants. Show less