Among 5 variants previously reported in patients with thrombosis, FGA p.Arg35Cys, FGG p.Arg301Cys, and FGG p.Asp344Gly showed markedly prolonged <i>T</i> <sup>lysis</sup> compared with the normal reference range, indicating altered clot formation-lysis kinetics. This evidence concerns the gene FGA and deep vein thrombosis.