Sinus pericranii is a rare vascular anomaly involving an abnormal communication between the intracranial and extracranial circulations through dilated diploic veins of the skull.

• 颅骨膜血窦是一种罕见的血管畸形，颅内与颅外血液循环借扩张的颅骨板障静脉形成异常交通。