Pure and Acute Korsakoff Syndrome Due to a Bilateral Anterior Fornix Infarction

MR Imaging of Subcallosal Artery Infarct Causing Amnesia after Surgery for Anterior Communicating Artery Aneurysm

“…However, considering the affected regions in our cases, the column of the fornix, a constituent of the Papez neuronal circuit (On-line Fig 3), seems the most likely responsible site for the amnesia. The same hypothesis has been suggested in the literature: Infarction relatively limited to the bilateral columns of the fornices on DWI has been separately reported in 4 patients with spontaneous stroke and acute onset of amnesia, [29][30][31][32] in a patient with amnesia following clipping, 33 and in another following coiling of an unruptured ACoA aneurysm.…”

Vertebral Artery Dissection Leading to Fornix Infarction: A Case Report

“…All previous reports of fornix infarction have identified occlusion of the subcallosal artery originating from the anterior communicating artery as the cause. 1,2,4 The subcallosal artery supplies blood flow not only to the fornix but also to regions containing the anterior cingulate cortex and genu of the corpus callosum, so occlusion of this artery often leads to the formation of cerebral infarctions in these regions. In our patient, however, embolus from the VA dissection would have had to move via the vertebral, basilar, posterior cerebral, posterior communicating, internal carotid, anterior cerebral, and anterior communicating arteries to reach the subcallosal artery.…”

“…Ó 2015 by National Stroke Association Fornix infarction is a very rare form of cerebral infarction 1 caused by occlusion of a branch of the anterior communicating artery known as the subcallosal artery. 2 The subcallosal artery has a single dominant main trunk 3 that, when occluded, results in bilateral fornix infarction. The subcallosal artery also supplies blood flow to regions including the anterior cingulate cortex and genu of the corpus callosum.…”

“…Therefore, cerebral infarctions in these regions are often associated with fornix infarction. 1,2,4 In this report, we describe a case of bilateral fornix infarction due to occlusion of the left lateral posterior choroidal artery, which is a previously unreported culprit vessel, after artery-to-artery embolism triggered by dissection of the vertebral artery (VA).…”

Selective Infarction of the Anterior Genu Fornices Associated with Giant Cell Arteritis

“…Ischemic fornix lesions with involvement of surrounding structures have been reported. [2][3][4][5] Here we report for the first time an isolated fornix infarction associated with biopsyproven giant cell arteritis (GCA).…”