When the tumor encases or displaces the abducens nerve: anatomically based strategies to prevent its injury in the retrosigmoid route
The obtained results demonstrated two surgical strategies to locate Dorello's canal within the retrosigmoid route: 1) approximately 20 mm anterior along the inferior edge of the PA parallel to the PTJ; and 2) approximately 6 mm inferior to the anterior edge of the TI, perpendicular to the PTJ. The defined operative strategies provide reliable anatomical guidance to locate the entrance of CN VI into Dorello's canal within the retrosigmoid route, potentially reducing the risk of abducens nerve palsy and improving patient outcomes.
Authors
- Fábio Torregrossa
- Luciano Leonel (ORCID: https://orcid.org/0000-0002-8066-4055)
- Amedeo Piazza (ORCID: https://orcid.org/0000-0001-5360-5810)
- Alessandro De Bonis
- Giuseppe S Lanzino (ORCID: https://orcid.org/0000-0003-1479-465X)
- Giovanni Grasso (ORCID: https://orcid.org/0000-0001-5362-0092)
- Yuki Shinya (ORCID: https://orcid.org/0000-0003-0097-5804)
- Stephen P. Graepel (ORCID: https://orcid.org/0009-0005-5364-7929)
- Michael J. Link
- María Peris Celda
Institutions
- Mayo Clinic (US)
- Vita-Salute San Raffaele University (IT)
- Mayo Clinic in Arizona (US)
- Mayo Clinic in Florida (US)
- Sapienza University of Rome (IT)
- University of Palermo (IT)
Publication Details
- Journal
- Journal of neurosurgery
- Published
- 2025-11-22
- DOI
- https://doi.org/10.3171/2025.6.jns25604
- Primary Topic
- Neurofibromatosis and Schwannoma Cases
- Type
- article
- Field-Weighted Citation Impact
- 0.00