Revisiting the Telovelar Approach for Lesions of the Mesial Part of the Cerebellar Peduncles by Using the Cerebellar Functional Networks to Guide Surgical Practice.
Anastasios A Politis, Aristotelis Kalyvas, Eirini Charalampopoulou et al.
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Case in brief
This report combined cadaveric dissections, tractography and three illustrative surgical cases to examine the telovelar approach for lesions involving the mesial cerebellar peduncles. The authors mapped the trajectories of fibers in the middle, inferior and superior peduncles and related these to operative anatomy. Their analysis indicated that the telovelar route primarily interacts with inferior peduncle fibers, whereas a retrosigmoid approach risks disrupting lateral middle peduncle fibers. The work provides an anatomic framework for selecting and performing an approach while considering preservation of cerebellar pathways.
What made this case unusual
The key distinction was the relationship between approach and fiber pathways: the telovelar route primarily encounters inferior peduncle fibers, while the retrosigmoid route risks lateral middle peduncle fibers. This comparison was informed by tractography and cadaveric anatomy as well as illustrative clinical cases.
Diagnostic / clinical pearl
For mesial cerebellar peduncle lesions, consider the distinct trajectories of middle, inferior and superior peduncle fibers when planning the surgical corridor, because approaches may differ in which pathways they risk disrupting.
Why it matters
Anatomic and tractographic understanding can inform intraoperative decisions aimed at preserving cerebellar white matter and potentially mitigating postoperative motor deficits.