Pericallosal artery aneurysm

Pericallosal artery aneurysm (PAA) are not common clinically and represent 2 to 9% of intracranial aneurysms.

These aneurysms tend to be smaller in size, broad-based, associated with additional aneurysms and at arterial branching sites, which can make both diagnosis and treatment difficult

see Anterior communicating artery aneurysm and pericallosal artery aneurysm

Proximal pericallosal artery aneurysm or A2 anterior cerebral artery aneurysm.

Clasical pericallosal artery aneurysm or A3 anterior cerebral artery aneurysm.

see Unruptured pericallosal artery aneurysm

see Traumatic pericallosal artery aneurysm.

Spontaneous subarachnoid hemorrhage and Interhemispheric Acute Subdural Hematoma suggest spontaneously pericallosal aneurysm, while traumatic corpus callosum hematoma as well the accompanying embryo of intraventricular hemorrhage suggest traumatic pericallosal aneurysm. Endovascular embolization is the primary surgical treatment for pericallosal aneurysm, while patients with pericallosal aneurysm are not suitable for surgical treatment. Microsurgical clipping treatment may be a choice. However, both of these treatment strategies have high risk 1).

Rupture of pericallosal artery aneurysm aneurysms in 12 patients gave rise to blood in the pericallosal cistern, anterior interhemispheric fissure and cistern of the lamina terminalis in 11. There was no blood in the septum pellucidum or the ventricular system in any case, but haematomas in the corpus callosum occurred in 8 (67%). In all of these, blood extended into the anterodorsal aspect of the callosum and spread posteriorly along its dorsal border. An identical, supracallosal pattern was seen in 2 patients (2.5%) with ACoA aneurysms, in whom haemorrhage was more extensive, with a large frontal lobe haematoma extending up from the cistern of the lamina terminalis in 1 and a haematoma of the septum pellucidum, with intraventricular extension in the other. In 8 patients (9%) with ACoA aneurysms a corpus callosum haematoma appeared to result from passage of blood up through the cistern of the lamina terminalis into the septum pellucidum and thence into the ventral aspect of the anterior corpus callosum; blood was present within the cistern, the septum and the ventricles 2).

Their treatment strategy, surgical or endovascular, will present specific challenges.

The management strategy for coiling as the first-intention treatment for ruptured pericallosal artery aneurysms has the potential to become an acceptable alternative to surgical clipping for selected cases, although a larger study population and longer follow-up periods are needed before definitive conclusions can be drawn 3).

see Pericallosal artery aneurysm endovascular treatment.

see Pericallosal artery aneurysm surgery.

Pericallosal artery aneurysm case series

Pericallosal artery aneurysm case reports

Sun GQ, Jin SG, Fu TK, Chen XT, Xu Z. Diagnosis and treatment of pericallosal artery aneurysms. Neurol Neurochir Pol. 2018 Jan - Feb;52(1):25-28. doi: 10.1016/j.pjnns.2017.09.007. Epub 2017 Sep 22. PubMed PMID: 28964406.
Jackson A, Fitzgerald JB, Hartley RW, Leonard A, Yates J. CT appearances of haematomas in the corpus callosum in patients with subarachnoid haemorrhage. Neuroradiology. 1993;35(6):420-3. PubMed PMID: 8377911.
Yamazaki T, Sonobe M, Kato N, Kasuya H, Ikeda G, Nakamura K, Ito Y, Tsuruta W, Nakai Y, Matsumura A. Endovascular coiling as the first treatment strategy for ruptured pericallosal artery aneurysms: results, complications, and follow up. Neurol Med Chir (Tokyo). 2013;53(6):409-17. PubMed PMID: 23803620.
  • pericallosal_artery_aneurysm.txt
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