Sinus Pericranii

**Definition:** Rare vascular anomaly involving a communication between the intracranial and extracranial venous circulation via diploe, the central spongy layer of cranial bone. It is often characterized by dilated venous structures on the scalp due to abnormal drainage from the intracranial venous sinuses. Sinus pericranii can be congenital or traumatic in origin.

**Tree numbers:** - C10.500.190.800 - C14.240.850.875.750 - C16.131.666.190.800