A 2-year-old male child with multiple tortuous veins on the frontal face came to our hospital with “sudden onset of right-sided limb weakness for 3 days and unconsciousness for 1 day”, and the cranial CT examination at the local hospital showed a class of round 3cm×2cm×2cm-sized high-density shadow in the hind limb of the left internal capsule and dorsal thalamus; after careful preparation, cerebral angiography showed: left occipital After careful preparation, cerebral angiography showed: dural arteriovenous fistula in the lateral sinus area supplied by the left occipital artery and the left middle meningeal artery, retrograde filling of the sagittal sinus and the large cerebral vein, and an abnormal filling of the basilar vein drainage area with venous aneurysm-like changes, large fistula opening, high flow, and compensatory opening of the ophthalmic vein to the outside of the skull. After a week of careful preparation, Prof. Yunyan Wang led the interventional team to perform an embolization of the dural arteriovenous fistula in the lateral sinus area. The catheter was passed through the curved and dilated occipital artery to reach the first fistula with a guidewire. First, three spring coils were placed through the fistula in order to slow down the blood flow in the left transverse sinus, and 0.5 ml of Glubran embolization gel was injected into the fistula. The postoperative angiogram showed restoration of positive blood flow in the sagittal sinus. The child was discharged 1 week after surgery. Dural arteriovenous fistulas (DAVFs) are abnormal communications between the dural sinuses, including the cavernous, lateral, and sagittal sinuses, and their adjacent arteriovenous vessels, which communicate with the intracranial venous sinuses from the extracranial blood supply, mostly in adults. There is no uniform understanding of the mechanism of its occurrence, which can be summarized into two categories: congenital factors and acquired factors. The former is considered to be related to congenital dilatation of small arteriovenous circuits. The latter is considered to be related to venous sinusitis. Trauma, surgery, and any other external factors can cause the opening of the reticular traffic between the dural arterioles and venous sinuses, forming arteriovenous fistulas. The condition of DAVF in the lateral sinus area is complex and difficult to treat. For DAVF supplied by external carotid artery and subclavian artery branches, selective endovascular embolization is the safe, effective and preferred method; for those with many blood supplying arteries and small branches of internal carotid artery and vertebral artery involved in blood supply, endovascular embolization combined with surgical treatment is appropriate. Figure A: Cranial CT examination of the child 4 h after the onset of the disease showed a type of round high-density shadow in the left posterior limb of the internal capsule and the dorsal thalamus. Figure B shows a lateral dural arteriovenous fistula in the lateral sinus area supplied by the left occipital artery and the left middle meningeal artery on the left common carotid arteriogram (lateral view). Figure C shows a dural arteriovenous fistula in the lateral sinus region with retrograde filling of the sagittal sinus and large cerebral veins and an abnormally filling venous aneurysm-like change in the basilar venous drainage area. Figure D Intraoperative angiogram (lateral view) shows that the catheter was passed through the occipital artery to the fistula with the help of a guide wire and the spring coil was placed through the fistula into the left transverse sinus in sequence. Figure E Postoperative imaging (lateral view) shows the lateral sinus area after embolization of a dural arteriovenous fistula.