Summary
Lenalidomide, a derivate of thalidomide, has recently been approved in Europe for
the treatment of patients with multiple myeloma. Although the substance has a better
effect/side-effect profile, especially with regard to teratogenicity and neurotoxicity,
the rate of therapy-induced thrombosis seems comparable to thalidomide. The observed
thromboembolic events were accompanied with a high rate of deleterious pulmonary embolism.
Interestingly, the substances alone are not thrombogenic but combination with anthracyclines,
dexamethasone or erythropesis-stimulating factors increases the risk considerably.
As up to one third of patients treated with such combinations are affected, antithrombotic
co-medication is highly recommended. This review elucidates the complex interactions
between an activated coagulation-system in myeloma patients and the molecular effects
of these drugs. This perception is important to choose the proper prophylactic co-medication
without increasing the risk of bleeding, especially in first-line treatment, patients
with high paraprotein-levels, or thrombopenia, either therapy-induced or due to bone-marrow
infiltration.
Keywords
Thalidomide - lenalidomide - thrombosis - prophylaxis - multiple myeloma