“…Similarly, four studies did not acknowledge the proportion of their cohorts who presented with pelvic fractures [5,26,28,30]. As Stannard et al [26] acknowledged, this patient group is associated with a high risk of VTE events [34][35][36][37][38], potentially due to the likelihood of clots involving the pelvic veins which have been reported in up to 58% of cases [34,35,38,39]. Furthermore, since pelvic and more proximal DVT are more difficult to detect on ultrasonography, there is a relative high rate of reported PE, despite negative findings on ultrasound [20,26,40].…”