Absence of the common carotid artery in a patient with a persistent trigeminal artery variant.

We found the present case when retrospectively reviewing the files of patients with intracranial aneurysm in our institution. It concerns the coexistence of a rare developmental anomaly of the aortic arch vessels and a persistent carotid-vertebrobasilar communication variant. Since no common embryologic basis is known, this association was probably fortuitous. Each of these particular anomalies can pose unique diagnostic and therapeutic difficulties. Rossitti, S. and Raininko, R. (2001). Clinical Radiology56, 79-81. Copyright 2001 The Royal College of Radiologists.