Episodic intermittent claudication associated with a Baker's cyst.

Baker first described synovial cysts in the leg in connection with diseases of the knee joint. Whilst the majority are asymptomatic, some present as a localised swelling behind the knee, and others either compress the popliteal vein or rupture and can be misdiagnosed as deep vein thrombosis; transmitted pulsation through the cyst can suggest the presence of a popliteal aneurysm. This paper documents a case of intermittent claudication of the lower limb secondary to compression of the popliteal artery by a Baker's cyst.