Summary
Factors that predispose to thrombus propagation from the femoropopliteal veins to
the pelvic veins are poorly understood. Our goal was to determine whether there are
characteristics that identify patients with massive deep vein thrombosis (DVT). We
compared the 122 (2.5%) patients presenting with massive DVT (pelvic plus lower-extremity
DVT) to the 4,674 (97.5%) patients with isolated lower-extremity DVT from a prospective
United States multicenter DVT registry. Patients with massive DVT were younger (59.4±18.9
years vs. 64.3±16.8 years; p<0.01), less likely to have hypertension (40% vs. 51%;
p=0.02), and more likely to smoke (21% vs. 13%; p=0.02) and have on- going radiation
therapy (7% vs. 3%; p=0.02). The massive DVT group more commonly presented with extremity
edema (80% vs. 69%; p<0.01) and erythema (21% vs. 12%; p<0.01) than the isolated lower-extremity
DVT group. However, after multivariable logistic regression analysis, extremity erythema
(adjusted odds ratio 1.86; 95% CI 1.13–3.04) was the only independent sequela of massive
DVT and younger age (adjusted odds ratio 1.17 per decreasing decade of age; 95% confidence
interval: 1.02-1.34) was the only independent predictor of massive DVT. Thrombus propagation
from the femoropopliteal system cannot be reliably predicted using demographic or
clinical characteristics.
Keywords
Deep vein thrombosis - ultrasound / diagnosis - clinical / epidemiological studies