Signification pronostique de la présence concomitante d'une thrombose veineuse superficielle chez les patients avec TVP.

Background: The prognostic significance of concomitant superficial vein thrombosis (SVT) in patients with lower-limb deep vein thrombosis (DVT) has not been consistently evaluated.

Methods: We used the RIETE (Registro Informatizado Enfermedad Trombo Embólica) registry to compare the rates of subsequent PE, recurrent DVT, major bleeding or death in patients with lower-limb DVT, according to the presence or absence of concomitant SVT.

Results: Since March 2015 to May 2020, there were 8,743 patients with lower-limb DVT. Of these, 745 (8.5%) had concomitant SVT. Most patients (97.4% in both subgroups) received anticoagulant therapy (median duration, 138 vs. 147 days). During follow-up (median, 193 vs. 210 days), 156 (1.8%) patients developed subsequent PE, 336 (3.8%) had recurrent DVT, 201 (2.3%) had major bleeding and 844 (9.7%) died. Patients with concomitant SVT had a higher rate of subsequent PE (rate ratio [RR]: 2.11; 95%CI: 1.33-3.24) than those with isolated DVT, with no significant differences in the rates of recurrent DVT (RR: 0.80; 95%CI: 0.50-1.21), major bleeding (RR: 0.77; 95%CI: 0.41-1.33) or death (RR: 0.81; 95%CI: 0.61-1.06). On multivariable analysis, patients with DVT and SVT concomitantly were at increased risk for subsequent PE during anticoagulation (adjusted hazard ratio [HR]: 2.23; 95%CI: 1.22-4.05) and also during the entire follow-up period (adjusted HR: 2.33; 95%CI: 1.49-3.66).

Conclusion: Patients with lower-limb DVT and SVT concomitantly are at increased risk to develop PE. Further studies are needed to externally validate our findings and to determine if these patients could benefit from a different management strategy.