![]() ![]() If the blood vessels are not related to the duramater and come from the cortical and/or pial regions, they are called PAVF. ![]() If there is no nidus the condition is referred to as arteriovenous fistula (AVF), which can be pial or dural. If there are abnormal vessels between the two systems (arterial and venous), they are called nidus and are considered an AVM. Many types of cerebrovascular lesions occur in the central nervous system, each one receiving a different name according to its morphological features. A large variceal dilatation of the proximal venous and was noted in association with the PAVF. Cerebral angiography showed a PAVF in the anterior frontal region, fed by a branch of the right middle cerebral artery, which drains into the Trolard vein. Neurological examination revealed mild left spastic hemiparesis.Ī CT brain scan indicated a frontal-temporal cortical hypotrophy on the right side and a dilated vascular image in the right anterior frontal region suggesting a cerebral AVM. Case 2Ī 3-year-old child, manifesting a progressive loss of strength on the left side of the body over a 6-month period was hospitalized. A postoperative control angiography revealed complete exclusion of these aneurysms. The patient was submitted to a surgical treatment of the aneurysm of the anterior communicating artery and two baby aneurysms on the right internal carotid artery. Keywords: Arteriovenous malformation, intracranial, pial arteriovenous fistulaĪn angiographic exam carried out 6 months after the patient's discharge revealed the persistence of three aneurysms, and a spontaneous regression of the aneurysm on the pericalosa artery. Both the cases were successfully treated by microsurgical procedure. The treatment of the condition consists of an occlusion of the supply vessel, which can be done by endovascular, microsurgical, or both procedures. ![]() The second case is of a 3-year-old child with a lesion in the right anterior frontal lobe, fed by a branch of the right middle cerebral artery, which drains into the Trolard vein and was associated with large a venous varix.Ĭonclusion:PAVF is a disease characterized by its rarity, and knowledge of PAVF's clinical presentation is of vital importance in early diagnosis. This study presents two cases of PAVF.Ĭase Description:The first case is of a 59-year-old male with lesions in the frontal region, fed by a branch of the right anterior cerebral artery and drained by the frontal basal vein to the sphenoparietal sinus. The key characteristic of the arteriovenous direct transition is that it offers a treatment option in which interruption of the blood flow can occur without removing the entire lesion. Due to high blood flows, varicose systems adjacent to the fistula appear. The condition is also characterized by the absence of a nidus. Background:Pial arteriovenous fistula (PAVF) is a rare vascular condition comprising of one or more arterial vessels that are in direct communication with the draining veins. ![]()
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