Microsurgical Anatomy of the Cerebellar Interpeduncular Entry Zones

Authors

Juan Leonardo Serrato-Avila, Department of Neurology and Neurosurgery, Universidade Federal de Sao Paulo, Sao Paulo, Brazil; Laboratory of Microneurosurgery Anatomy, Universidade Federal de Sao Paulo, Sao Paulo, Brazil.
Juan Alberto Archila, Department of Neurology and Neurosurgery, Universidade Federal de Sao Paulo, Sao Paulo, Brazil; Laboratory of Microneurosurgery Anatomy, Universidade Federal de Sao Paulo, Sao Paulo, Brazil.
Marcos Devanir da Costa, Department of Neurology and Neurosurgery, Universidade Federal de Sao Paulo, Sao Paulo, Brazil; Laboratory of Microneurosurgery Anatomy, Universidade Federal de Sao Paulo, Sao Paulo, Brazil.
Paulo Ricardo Biol, Laboratory of Microneurosurgery Anatomy, Universidade Federal de Sao Paulo, Sao Paulo, Brazil; Department of Morphology and Genetics, Universidade Federal de Sao Paulo, Sao Paulo, Brazil.
Sergio Ricardo Marques, Department of Morphology and Genetics, Universidade Federal de Sao Paulo, Sao Paulo, Brazil.
Luis Otavio de Moraes, Department of Morphology and Genetics, Universidade Federal de Sao Paulo, Sao Paulo, Brazil.
Kaan Yagmurlu, Departments of Neurosurgery and Neuroscience, University of Virginia, Health System, Charlottesville, Virginia, USA.
Michael T. Lawton, Department of Neurosurgery, Barrow Neurological Institute, Phoenix, Arizona, USA.Follow
Sergio Cavalheiro, Department of Neurology and Neurosurgery, Universidade Federal de Sao Paulo, Sao Paulo, Brazil; Laboratory of Microneurosurgery Anatomy, Universidade Federal de Sao Paulo, Sao Paulo, Brazil.
Feres Chaddad-Neto, Department of Neurology and Neurosurgery, Universidade Federal de Sao Paulo, Sao Paulo, Brazil; Laboratory of Microneurosurgery Anatomy, Universidade Federal de Sao Paulo, Sao Paulo, Brazil; Department of Neurosurgery, Hospital Beneficência Portuguesa de São Paulo, São Paulo, Brazil. Electronic address: fereschaddad@hotmail.com.

Document Type

Article

Abstract

OBJECTIVE: The cerebellar interpeduncular region, particularly the middle cerebellar peduncle (MCP) and interpeduncular sulcus (IPS) are significant surgical relevance areas due to the high prevalence of vascular and tumoral pathologies, such as cavernomas, arteriovenous malformations, and gliomas. We defined safer access areas of the MCP and the IPS, according to the surface anatomy, involved vessels, and fiber tracts of the cerebellar interpeduncular region. METHODS: Fifteen formalin-fixed and silicone-injected cadaveric heads and 23 human brainstems with attached cerebellums prepared with the Klingler's technique were bilaterally dissected to study the vascular and intrinsic anatomy. RESULTS: Surface anatomy: The mean length of the IPS was 12.73 mm (standard deviation [SD],2.15 mm), and the average measured angle formed by the IPS and the lateral mesencephalic sulcus was 144.53°. The mean distance from the uppermost point of the IPS to cranial nerve IV was 2.63 mm (SD, 2.84 mm). Vascular anatomy: The perforating branches of the superior cerebellar peduncle, IPS, and MCP originated predominantly from the caudal trunk of the superior cerebellar artery. The inferior third of the superior cerebellar peduncle and IPS was the third most pierced by perforating arteries, and for the MCP, was its superior third. Crossing vessels: The branches of the pontotrigeminal vein and the caudal trunk of the superior cerebellar artery crossed the IPS mostly. The superior third of the IPS was the most crossed by arteries and veins. CONCLUSIONS: The middle thirds of the IPS and MCP as entry zones might be safer than their superior and inferior thirds due to fewer perforating branches, arterial trunks, and veins crossing the sulcus as fewer eloquent tracts.

Medical Subject Headings

Basilar Artery (surgery); Cerebellum (blood supply, surgery); Formaldehyde; Humans; Microsurgery (methods); Silicones

Publication Date

10-1-2022

Publication Title

World neurosurgery

E-ISSN

1878-8769

Volume

166

First Page

e933

Last Page

e948

PubMed ID

35948221

Digital Object Identifier (DOI)

10.1016/j.wneu.2022.07.142

Recommended Citation

Serrato-Avila, Juan Leonardo; Archila, Juan Alberto; da Costa, Marcos Devanir; Biol, Paulo Ricardo; Marques, Sergio Ricardo; de Moraes, Luis Otavio; Yagmurlu, Kaan; Lawton, Michael T.; Cavalheiro, Sergio; and Chaddad-Neto, Feres, "Microsurgical Anatomy of the Cerebellar Interpeduncular Entry Zones" (2022). Neurosurgery. 1813.
https://scholar.barrowneuro.org/neurosurgery/1813