A Classification for the Anterior Inferior Cerebellar Artery—Subarcuate Artery Complex Based on the Embryological Development
| Autor: | Pablo Ajler, Alvaro Campero, Pedro Plou, Jorge Rasmussen |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Subarcuate fossa
medicine.medical_specialty medicine.diagnostic_test business.industry Magnetic resonance imaging Cerebellopontine angle Petrosal bone 030218 nuclear medicine & medical imaging Anterior inferior cerebellar artery 03 medical and health sciences 0302 clinical medicine medicine.anatomical_structure medicine.artery Embryology medicine MULTIPLE VARIATIONS Neurology (clinical) Radiology business 030217 neurology & neurosurgery Artery |
| Zdroj: | J Neurol Surg B Skull Base |
| ISSN: | 2193-634X 2193-6331 |
| DOI: | 10.1055/s-0039-1692474 |
| Popis: | Objective To hierarchize the anterior inferior cerebellar artery (AICA)–subarcuate artery (SAA) complex's variations in the surgical field. Background The AICA's “subarcuate loop” (SL) presents multiple variations, closely related to the SAA. AICA-SAA complex's variations may represent major issues in cerebellopontine angle (CPA) surgery. As the spectrum of configurations is originated during the development, a systematized classification was proposed based on the interaction between the petrosal bone and the AICA in the embryonic period. Methods The variations were defined as follow: Grade 0: free, purely cisternal AICA, unidentifiable or absent SAA; Grade 1: purely cisternal AICA, loose SL, SAA > 3 mm; Grade 2: AICA near the subarcuate fossa, pronounced SL, SAA Results Eighty-four patients were evaluated, including 161 CPA. The proportions found in the gradation remained within the range of previous publications (Grade 0: 42.2%; Grade 1: 11.2%; Grade 2: 35.4%; Grade 3: 10.6%; and Grade 4: 0.6%). Moreover, the degrees of the classification were related to the complexity of the anatomical relationships and, therefore, to the difficulty of the maneuvers required to overcome them. Conclusion The proposed AICA-SAA complex classification allowed to distinguish and objectify pre- and intraoperatively the spectrum of variations, to thoroughly plan the required actions and instrumentation. |
| Databáze: | OpenAIRE |
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