Spontaneous involution of two sinus pericranii - a unique case and review of the literature.

Sinus pericranii is a rare vascular anomaly in which an abnormal communication exists between the extracranial venous system and the dural venous sinuses. The natural history is of increasing size and potential life-threatening complications, including thrombosis and haemorrhage. Thus surgical management is the mainstay of treatment. We present a unique case of spontaneous involution of two sinus pericranii in a 1-year-old patient, the second reported case of spontaneous involution in the literature, and the first in which regression occurred at such a young age. The clinical, diagnostic and management options are discussed.