Natural History of Isolated Calf Vein Thrombosis - A Prospective Cohort Under Ultrasound Surveillance

"Patients presenting with symptomatic ICVT will be examined by CCUS for both legs. Inclusion/exclusion criteria will be checked. No anticoagulation therapy is given. Compression stockings at the calf length will be prescribed for 30 days.~CCUS will be repeated on day 5±2, day 10±2, and day 30±4. If the ICVT has propagated into the trifurcation area, the popliteal vein, or into more proximal veins therapy will be implemented according to current guidelines for proximal DVT. If no propagation to proximal veins has occurred anticoagulation will be withheld further on."