[Arterial sinus pericranii. First case report].

Area of Science:

• Vascular Surgery
• Neuroradiology
• Pediatric Neurosurgery

Background:

• Sinus pericranii (SP) is a rare congenital venous malformation with intracranial-extracranial venous system communication.
• SP typically presents as a midline cranial mass that enlarges with Valsalva maneuver.
• A similar anomaly involving arterial systems has not been previously documented.

Observation:

• A 6-year-old boy presented with a progressively enlarging midline frontal bone mass.
• Imaging revealed a high-flow arteriovenous malformation with intracranial arterial connection.
• The lesion was successfully treated with embolization and surgical excision.

Findings:

• Histopathological analysis confirmed the lesion as an arteriovenous malformation, not a venous malformation like SP.
• The patient remains asymptomatic with no recurrence at age 10.
• This case highlights a distinct arterial counterpart to SP.

Implications:

• Accurate diagnosis differentiating arterial from venous malformations is critical for appropriate management.
• Early intervention and follow-up are essential for optimal long-term outcomes in cranial vascular anomalies.
• This finding expands the understanding of congenital cranial vascular malformations.