Sinus Pericranii: a case report and review of literature.

Normally, there is no obvious communication between the intracranial and extra cranial venous drainages in the head. In Sinus Pericranii, there is an abnormal communication, either from the extra cranial system to the intracranial venous sinuses or from the intracranial venous system to the extra cranial draining veins. Venous anomaly is a collection of non muscular venous blood vessels, adhering tightly to the outer surface of the skull and directly communicating with an intracranial venous sinus through diploic veins. The varicosities are intimately associated with the periostium, are distensible, and vary in size with changes in intracranial pressure Sinus pericranii is not a single clinico pathologic entity, rather a symptom complex with diverse clinical manifestations.In this article,the authors present a case of 8 mo old boy having Sinus Pericranii.