We encountered a 73-year-old man with acute pulmonary embolism (PE) an
d Baker's cyst. Venography revealed that the right popliteal vein was
compressed by Baker's cyst and deep venous thrombosis (DVT) had develo
ped. DVT associated with Baker's cyst is rather common and these two c
onditions are thought to be causally related. Baker's cyst is the most
frequent mass lesion in the popliteal region. We suggest that Baker's
cyst is a risk factor for PE as well as surgery and trauma.