Introduction: An aberrant or anomalous subarcuate artery and its canal is an extremely rare and clinically significant finding. If accidentally nicked or injured, it can cause inadvertent hemorrhage and obscure the surgical field.
Case Report: We present a case of 21 year old made with Chronic Otitis Media of the right ear who was incidentally diagnosed with a dilated subarcuate canal and an aberrant subarcuate artery atypically associated with lateral semicircular canal and facial nerve.
Conclusions: Prior knowledge of this symptomatically dormant variation is important, particularly in retrofacial tympanomastoidectomy and cerebello-pontine angle tumor surgeries. Pre-operative temporal bone scans are advisable in such cases.
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| http://dx.doi.org/10.22038/IJORL.2022.61681.3120 | DOI Listing |
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Management of a challenging dura-embedded anterior inferior cerebellar artery loop during a retrosigmoid hearing-preserving vestibular schwannoma resection: microsurgical technique and operative video. Illustrative case.
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1Department of Neurological Surgery, University of Wisconsin-Madison, Madison, Wisconsin; and.
Background: Anatomical variants of the anterior inferior cerebellar artery (AICA), such as an anomalous "AICA loop" embedded in the dura and bone of the subarcuate fossa, increase the complexity and risk of vestibular schwannoma resections. Classically, osseous penetrating AICA loops are the most challenging to mobilize, as the dura must be dissected and the surrounding petrous bone must be drilled to mobilize the AICA away from the surgical corridor and out of harm.
Observations: The authors present a rare case of a dura-embedded, osseous-penetrating AICA loop encountered during a hearing-preserving retrosigmoid approach in which they demonstrate safe and efficient microdissection and mobilization of the AICA loop without having to drill the surrounding bone.
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Acta Neurochir (Wien)
September 2022
Department of Neurosurgery, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China.
Background: An anomalous subarcuate loop (SL) of the anteroinferior cerebellar artery (AICA) is a rare anatomic variation, which increases the complexity and risk of vestibular schwannoma (VS) removal. However, preoperative diagnosis of this anomaly remains difficult. The aim of this study was to report three types of anomalous SLs encountered during VS removal and to describe the "Deep Subarcuate Fossa (SF)" sign and its significance in the diagnosis and treatment of an osseous-penetrating SL.
View Article and Find Full Text PDFAnomalous Subarcuate Canal and Artery: A Rare Anatomical Variation.
Iran J Otorhinolaryngol
May 2022
Department of Otorhinolaryngology and Head and Neck Surgery, Dr. S.N. Medical College, Jodhpur, Rajasthan, India.
Introduction: An aberrant or anomalous subarcuate artery and its canal is an extremely rare and clinically significant finding. If accidentally nicked or injured, it can cause inadvertent hemorrhage and obscure the surgical field.
Case Report: We present a case of 21 year old made with Chronic Otitis Media of the right ear who was incidentally diagnosed with a dilated subarcuate canal and an aberrant subarcuate artery atypically associated with lateral semicircular canal and facial nerve.
An incidence of anteroinferior cerebellar artery/posteroinferior cerebellar artery anatomic variants penetrating the subarcuate fossa dura: operative technique and identification with 3-dimensional fast imaging employing steady-state acquisition magnetic resonance imaging.
Neurosurgery
June 2010
Division of Neurosurgery, Department of Surgery, University of British Columbia and Vancouver General Hospital, Vancouver, British Columbia, Canada.
Objective: This case series reports an incidence of anomalous vascular anatomy within the cerebellopontine angle. The relevant literature effectively describes techniques for mobilization yet underestimates the incidence. There has been no literature on the use of magnetic resonance imaging (MRI) to preoperatively identify this anatomic variant.
View Article and Find Full Text PDFThe anteroinferior cerebellar artery embedded in the subarcuate fossa: a rare anomaly and its clinical significance.
Neurosurgery
August 2005
Department of Neurological Surgery, University of Florida, Gainesville, Florida 32610-0265, USA.
Objective: The purpose of this study is to call attention to an anomaly in which a segment of the anteroinferior cerebellar artery (AICA) is embedded in the dura or bone surrounding the subarcuate fossa, a small depression in the bone posterior to the internal acoustic meatus (IAM), through which the subarcuate artery enters the bone. This anomaly places the artery at risk in removing the posterior wall of the IAM.
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