bovine arch
An anatomical variant where the brachiocephalic trunk and left common carotid artery share a common origin from the aortic arch.
Full Definition
A bovine arch is a common anatomical variant of the aortic arch occurring in approximately 15-20% of the population, where the brachiocephalic trunk and left common carotid artery arise from a common trunk rather than separately. This configuration resembles the normal anatomy found in cattle, hence the name. The variant can complicate catheter-based interventions and must be recognized during carotid artery procedures, as it may affect access routes and surgical planning. Despite the name suggesting pathology, this is a normal anatomical variant that typically does not cause clinical symptoms but has important procedural implications.
Usage
Usage note: Do not capitalize 'bovine' unless beginning a sentence; the term refers to normal anatomy, not pathology.
In Context
- "Preoperative imaging revealed a bovine arch configuration that would complicate endovascular access." — operative planning note
- "The presence of a bovine arch required modification of the standard carotid stenting approach." — procedure report