Thrombosed Large Distal Posterior Inferior Cerebellar Artery Aneurysm Mimicking an Infratentorial Ependymoma
Large or giant intracranial aneurysms can simulate brain tumors clinically and radiologically by virtue of their progressive mass effect. Unlike aneurysms from alternative locations, those arising from the distal posterior inferior cerebellar artery (PICA) are uncommon. We report a patient who exper...
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | Case Reports in Neurological Medicine |
| Online Access: | http://dx.doi.org/10.1155/2014/435953 |
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| author | Peter Yat Ming Woo Natalie Man Wai Ko Kwong Yau Chan |
| author_facet | Peter Yat Ming Woo Natalie Man Wai Ko Kwong Yau Chan |
| author_sort | Peter Yat Ming Woo |
| collection | DOAJ |
| description | Large or giant intracranial aneurysms can simulate brain tumors clinically and radiologically by virtue of their progressive mass effect. Unlike aneurysms from alternative locations, those arising from the distal posterior inferior cerebellar artery (PICA) are uncommon. We report a patient who experienced progressive hemiparesis with magnetic resonance imaging findings suggestive of an infratentorial ependymoma. Intraoperatively, a thrombosed large aneurysm of the distal PICA was unexpectedly encountered. The aneurysm was clipped and the patient did not develop any permanent neurological deficit. This case illustrates the radiological nuances of large aneurysms and infratentorial ependymomas. Three-dimensional contrast-enhanced magnetic resonance angiography can be falsely negative and the importance of the “target” sign is emphasized. One should be cognizant of this possible diagnosis for patients with midline fourth ventricular lesions in order to reduce surgical risk. |
| format | Article |
| id | doaj-art-cb048b123d0f4309b3008c25948ca6bd |
| institution | Kabale University |
| issn | 2090-6668 2090-6676 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Case Reports in Neurological Medicine |
| spelling | doaj-art-cb048b123d0f4309b3008c25948ca6bd2025-02-03T06:07:26ZengWileyCase Reports in Neurological Medicine2090-66682090-66762014-01-01201410.1155/2014/435953435953Thrombosed Large Distal Posterior Inferior Cerebellar Artery Aneurysm Mimicking an Infratentorial EpendymomaPeter Yat Ming Woo0Natalie Man Wai Ko1Kwong Yau Chan2Department of Neurosurgery, Kwong Wah Hospital, 25 Waterloo Road, Hong KongDepartment of Neurosurgery, Kwong Wah Hospital, 25 Waterloo Road, Hong KongDepartment of Neurosurgery, Kwong Wah Hospital, 25 Waterloo Road, Hong KongLarge or giant intracranial aneurysms can simulate brain tumors clinically and radiologically by virtue of their progressive mass effect. Unlike aneurysms from alternative locations, those arising from the distal posterior inferior cerebellar artery (PICA) are uncommon. We report a patient who experienced progressive hemiparesis with magnetic resonance imaging findings suggestive of an infratentorial ependymoma. Intraoperatively, a thrombosed large aneurysm of the distal PICA was unexpectedly encountered. The aneurysm was clipped and the patient did not develop any permanent neurological deficit. This case illustrates the radiological nuances of large aneurysms and infratentorial ependymomas. Three-dimensional contrast-enhanced magnetic resonance angiography can be falsely negative and the importance of the “target” sign is emphasized. One should be cognizant of this possible diagnosis for patients with midline fourth ventricular lesions in order to reduce surgical risk.http://dx.doi.org/10.1155/2014/435953 |
| spellingShingle | Peter Yat Ming Woo Natalie Man Wai Ko Kwong Yau Chan Thrombosed Large Distal Posterior Inferior Cerebellar Artery Aneurysm Mimicking an Infratentorial Ependymoma Case Reports in Neurological Medicine |
| title | Thrombosed Large Distal Posterior Inferior Cerebellar Artery Aneurysm Mimicking an Infratentorial Ependymoma |
| title_full | Thrombosed Large Distal Posterior Inferior Cerebellar Artery Aneurysm Mimicking an Infratentorial Ependymoma |
| title_fullStr | Thrombosed Large Distal Posterior Inferior Cerebellar Artery Aneurysm Mimicking an Infratentorial Ependymoma |
| title_full_unstemmed | Thrombosed Large Distal Posterior Inferior Cerebellar Artery Aneurysm Mimicking an Infratentorial Ependymoma |
| title_short | Thrombosed Large Distal Posterior Inferior Cerebellar Artery Aneurysm Mimicking an Infratentorial Ependymoma |
| title_sort | thrombosed large distal posterior inferior cerebellar artery aneurysm mimicking an infratentorial ependymoma |
| url | http://dx.doi.org/10.1155/2014/435953 |
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