Blue toe syndrome after initiation of low-dose oral anticoagulation.

Cholesterol emboli are a known complication after arterial catheterization, arterial surgery, and after lysis with plasminogen activators. The clinical presentation of cholesterol emboli is variable ranging from a localized blue toe syndrome to a multisystem disease. The purpose of this case report is to report on a patient with blue toe syndrome and livedo reticularis occuring two months after initiation of low-dose oral anticoagulation with phenproucomon. The non-invasive studies revealed an infrarenal abdominal aneurysma lined by a thin wall thrombus as a potential source of cholesterol emboli. The patient had a benign course with resolution of toe pain after a period of four weeks, without development of an ulceration. The case report demonstrates that cholesterol emboli may also occur in patients treated with low-dose oral anticoagulation and no previous arterial catheterization.