Anatomic Study of Posterior Communicating Artery in Computed Tomographic Image

Area of Science:

• Neurosurgery
• Radiology
• Anatomy

Background:

• The posterior communicating artery (PComA) is crucial for cerebral circulation.
• Variations in PComA anatomy can complicate surgical approaches.
• Accurate anatomical data is needed for safe surgical interventions.

Purpose of the Study:

• To provide detailed anatomical data of the posterior communicating artery (PComA).
• To elucidate the anatomical relationship between PComA and adjacent structures.
• To guide surgeons in clipping internal carotid artery-PComA aneurysms and resecting sellar tumors without PComA injury.

Main Methods:

• Review of 123 computed tomographic angiography images.
• Multiplanar reconstruction for detailed analysis.
• Classification and measurement of PComA in relation to anterior clinoid process (ACP), posterior clinoid process (PCP), and sagittal midline.

Main Results:

• Six distinct types of PComA were identified based on existence and origin.
• The initial segment of PComA can be reliably located using ACP, PCP, and sagittal midline with specific measurements.
• Established anatomical landmarks for PComA localization were identified.

Conclusions:

• Posterior communicating artery anatomy exhibits significant individual variation.
• Radiological studies are optimal for analyzing PComA variations.
• Understanding the anatomic relations between PComA and skull base structures (ACP, PCP) is vital for neurosurgical safety.