Superficial temporal artery to middle cerebral artery (STA-MCA) bypass via retrograde arterial anastomosis in a patient with common carotid artery occlusion: a case report.

The standard superficial temporal artery to middle cerebral artery (STA-MCA) bypass depends on adequate antegrade flow in the STA. In the setting of occlusion of the common or external carotid arteries, revascularization requires modification of the standard bypass procedure. A patient with prior history of irradiation for head and neck carcinoma presented with an ischemic injury and fluctuating neurologic deficit not responsive to medical therapy. His left common carotid artery was occluded, but angiographic evaluation demonstrated retrograde filling of his left STA. Reverse STA-MCA bypass was performed, taking advantage of spontaneous collateralization which allowed for retrograde filling of the STA.