Intrasellar carotid anastomosis simulating pituitary microadenoma.

Area of Science:

• Neuroanatomy
• Vascular Anomalies
• Radiology

Background:

• Agenesis of the unilateral internal carotid artery (ICA) is a rare congenital condition.
• Arterial communication between the cavernous segments of the carotid arteries is an infrequent finding associated with ICA agenesis.
• The sella turcica's anatomy can be affected by vascular structures within the cavernous sinus.

Observation:

• Two cases presenting with agenesis of the unilateral internal carotid artery were identified.
• An anomalous arterial communication between the cavernous segments of the carotid arteries was observed in both cases.
• The anomalous artery exhibited an intrasellar course, resulting in an abnormal sella turcica morphology.

Findings:

• Detailed anatomical description of the rare arterial communication associated with unilateral internal carotid artery agenesis.
• Radiological evidence of intrasellar arterial course causing sella turcica abnormalities.
• Confirmation of a rare vascular anomaly impacting sellar structure.

Implications:

• Highlights the importance of recognizing rare vascular anomalies in neuroimaging.
• Suggests potential for sella turcica abnormalities in cases of internal carotid artery agenesis.
• Contributes to the understanding of cerebrovascular development and variations.