scholarly journals A Case of Spontaneous Subarachnoid Hemorrhage Mimicking Distal Posterior Inferior Cerebellar Artery Aneurysm on Computed Tomographic Angiography

2018 ◽  
Vol 46 (4) ◽  
pp. 303-307
Author(s):  
Hidekazu TANAKA ◽  
Masahiro KAWANISHI ◽  
Akira SUGIE ◽  
Makoto YAMADA ◽  
Kunio YOKOYAMA ◽  
...  
Keyword(s):  
Subarachnoid Hemorrhage ◽  
Posterior Inferior Cerebellar Artery ◽  
Artery Aneurysm ◽  
Computed Tomographic Angiography ◽  
Computed Tomographic ◽  
Cerebellar Artery ◽  
Tomographic Angiography ◽  
Spontaneous Subarachnoid Hemorrhage

Abstract T P177: Non-dominant Vertebral Artery With Higher Resistance Flow Pattern Is A Risk Factor For Ischemic Stroke

Stroke ◽  
2015 ◽  
Vol 46 (suppl_1) ◽  
Author(s):  
Leonard yeo ◽  
Amit Batra ◽  
Ashley Tan ◽  
Song Majinyang ◽  
Darren Low ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Flow Pattern ◽  
Posterior Inferior Cerebellar Artery ◽  
Computed Tomographic Angiography ◽  
Mean Flow ◽  
Computed Tomographic ◽  
Vertebral Arteries ◽  
Cerebellar Artery ◽  
Intracranial Arteries ◽  
Tomographic Angiography

Background and aims: The diameters of the vertebral arteries (VAs) are very often unequal and the larger artery is called ‘dominant’. We investigated whether the hemodynamic parameters differ between the ‘dominant’ and ‘non-dominant’ variants. Methods: Consecutive patients who underwent computed tomographic angiography (CTA) of cervical and intracranial arteries, cervical duplex (CDU) and transcranial Doppler (TCD) ultrasonography were included. VA diameters (cervical and intracranial segments) were measured on CTA. Flow velocities recorded were peak systolic (PSV), end-diastolic (EDV), mean flow (MFV). Pulsatility index (PI) and ratio of distal-to-proximal VAs were computed. Results: Of the total 501 patients admitted during 2012 with acute ischemic stroke, both CTA and ultrasound data were available for VAs for 161 (32%). The dominant VA was more frequent on the left side (p<0.01). Non-dominant VAs were found to have lower MFV (27cm/s versus 38cm/s; p<0.01) and higher PI (1.27 versus 1.0; p<0.01) as compared to the dominant variant. In most patients, proximal basilar artery was noted to be on the side of non-dominant artery. Posterior inferior cerebellar artery territory infarcts and lateral medullary infarcts were noted in 38 (7.6%) patients. These infarcts were noted more commonly on the same side as the non-dominant intracranial VA side (p<0.01), especially when associated with low MFV (p<0.01) and high PI (p<0.01). Conclusions: The risk of ischemic stroke in VA territory is higher with the non-dominant artery, especially when it is associated with higher-resistance flow pattern.

Extracranial Posterior Inferior Cerebellar Artery Aneurysm Causing Isolated Intraventricular Hemorrhage: A Case Report

Neurosurgery ◽  
1988 ◽  
Vol 23 (6) ◽  
pp. 774-777 ◽  
Author(s):  
Antonio Ruelle ◽  
Paolo Cavazzani ◽  
Giancarlo Andrioli
Keyword(s):  
Subarachnoid Hemorrhage ◽  
Intraventricular Hemorrhage ◽  
Posterior Inferior Cerebellar Artery ◽  
Artery Aneurysm ◽  
Foramen Magnum ◽  
Computed Tomographic ◽  
Left Posterior ◽  
Cerebellar Artery ◽  
Computed Tomographic Scan ◽  
Pica Aneurysms

Abstract The authors report the unusual case of an aneurysm arising on an extracranial loop of the left posterior inferior cerebellar artery (PICA). The computed tomographic scan showed an isolated hemorrhage in the lateral ventricles, and the lesion was recognized 1.5 cm below the foramen magnum at the level of the atlas. The literature concerning peripheral PICA aneurysms is reviewed and the clinical and radiological features of these lesions are discussed. A tendency for subarachnoid bleeding from distal PICA aneurysm ruptures to spread into the ventricular system is suggested. The diagnosis of distal PICA aneurysm should also be considered in cases of isolated intraventricular hemorrhage without obvious parenchymal or subarachnoid hemorrhage. The need for four-vessel angiography when studying patients suffering from a subarachnoid hemorrhage is stressed.

scholarly journals Computed Tomographic Angiography for Cerebral Aneurysms in Spontaneous Subarachnoid Hemorrhage

2016 ◽  
Vol 35 (04) ◽  
pp. 285-290
Author(s):  
Hugo Sterman Neto ◽  
Marcos Gomes ◽  
Suzana Alves ◽  
Wellingson Paiva ◽  
Manoel Teixeira ◽  
...  
Keyword(s):  
Subarachnoid Hemorrhage ◽  
Cerebral Aneurysms ◽  
Computed Tomographic Angiography ◽  
Computed Tomographic ◽  
Tomographic Angiography ◽  
Spontaneous Subarachnoid Hemorrhage

EXTRACRANIAL ANEURYSM OF THE POSTERIOR INFERIOR CEREBELLAR ARTERY WITH AN ABERRANT ORIGINATION

Neurosurgery ◽  
2007 ◽  
Vol 61 (5) ◽  
pp. E1097-E1098 ◽  
Author(s):  
Seyed Ali Fakhr Tabatabai ◽  
Mehdi Zeinali Zadeh ◽  
Ali Tayebi Meybodi ◽  
Mohammad Hashemi
Keyword(s):  
Posterior Inferior Cerebellar Artery ◽  
Computed Tomographic Angiography ◽  
Sudden Onset ◽  
Anterior Inferior Cerebellar Artery ◽  
Computed Tomographic ◽  
Suboccipital Craniectomy ◽  
Cerebellar Artery ◽  
Upper Cervical ◽  
The Right ◽  
Tomographic Angiography

Abstract OBJECTIVE Aneurysms of the extracranially originating posterior inferior cerebellar artery are very rare. An anatomic insight of its possible course and variations is necessary when confronting such extraordinary lesions. CLINICAL PRESENTATION A 19-year-old man presented with the sudden onset of severe headaches. A physical examination was positive only for neck rigidity. Computed tomographic scans of the brain depicted intraventricular hemorrhage. TECHNIQUE AND INTERVENTION Four-vessel brain digital subtraction angiography revealed an extracranial posterior inferior cerebellar artery arising extradurally from the right vertebral artery between the C1 and C2 vertebrae, bearing a saccular aneurysm in an upper cervical intradural location. An anterior inferior cerebellar artery-posterior inferior cerebellar artery variant was also found on the left side. Computed tomographic angiography failed to unmask the lesion. The aneurysm was clipped through a suboccipital craniectomy and C1 laminectomy. CONCLUSION The patient did well after surgery and was discharged from the hospital without neurological deficit. One can conclude that a comprehensive diagnostic approach oriented to the patient history and clinical data is mandatory to preclude such lesions evading the vigilant surgeon.

Contrast Extravasation on Computed Tomographic Angiography Mimicking a Basilar Artery Aneurysm in Angiogram-Negative Subarachnoid Hemorrhage

Neurosurgery ◽  
2012 ◽  
Vol 71 (5) ◽  
pp. E1047-E1052 ◽  
Author(s):  
Nate D. Stetson ◽  
John Pile-Spellman ◽  
Jonathan L. Brisman
Keyword(s):  
Subarachnoid Hemorrhage ◽  
Digital Subtraction Angiography ◽  
Basilar Artery ◽  
Artery Aneurysm ◽  
Computed Tomographic Angiography ◽  
Vascular Lesion ◽  
Digital Subtraction ◽  
Contrast Extravasation ◽  
Computed Tomographic ◽  
Tomographic Angiography

Abstract BACKGROUND AND IMPORTANCE: Contrast extravasation on computed tomography angiography (CTA) is becoming more common, with increasing use of CTA for myriad intracranial vascular pathologies. This article describes the first 2 documented cases of contrast extravasation from a nonaneurysmal basilar artery source seen on CTA and discusses possible pathophysiologic mechanisms. CLINICAL PRESENTATION: We present 2 cases of diffuse atraumatic subarachnoid hemorrhage in which the CTA showed an abnormality in association with the basilar artery highly suggestive of a ruptured aneurysm. Follow-up digital subtraction angiography, however, was completely negative. Subsequent repeat digital subtraction angiography failed to reveal a vascular lesion. Both patients were treated for complications associated with SAH, but given the negative digital subtraction angiography, no intervention was performed. CONCLUSION: Because of the frequent use of CTA, contrast extravasation is an increasingly common observation. Physicians should be aware that basilar artery extravasation can mimic the appearance of an aneurysm.

Computed Tomographic Angiography for the Evaluation of Aneurysmal Subarachnoid Hemorrhage

2006 ◽  
Vol 13 (5) ◽  
pp. 486-492 ◽  
Author(s):  
Shaun D. Carstairs ◽  
David A. Tanen ◽  
Timothy D. Duncan ◽  
Olaf B. Nordling ◽  
John E. Wanebo ◽  
...  
Keyword(s):  
Subarachnoid Hemorrhage ◽  
Aneurysmal Subarachnoid Hemorrhage ◽  
Computed Tomographic Angiography ◽  
Computed Tomographic ◽  
Tomographic Angiography
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