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Published on: June 28, 2024
Telovelar approach: technical issues for large fourth ventricle tumors.
B J Rajesh1, B R M Rao, G Menon
1Department of Neurosurgery, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, Kerala, India. bjraj1@sctimst.ac.in
Summary
The telovelar approach offers a minimally invasive route to the fourth ventricle, potentially reducing surgical morbidity. However, careful dissection is crucial to avoid postoperative ataxia and mutism, especially with large tumors.
Area of Science:
- Neurosurgery
- Surgical Oncology
Background:
- Conventional surgical access to the fourth ventricle often involves vermian resection, leading to significant patient morbidity.
- Minimally invasive surgical approaches, including transforaminal, subtonsillar, and telovelar routes, aim to reduce operative risks by utilizing natural avascular planes.
Purpose of the Study:
- To emphasize the telovelar surgical technique for fourth ventricle tumor excision.
- To highlight challenges and potential complications associated with the telovelar approach for large fourth ventricle tumors.
Main Methods:
- A retrospective review of 15 patients with fourth ventricle tumors operated between January and September 2005.
- All patients underwent surgery in the prone oblique position utilizing the telovelar approach.
- Tumor types included 14 medulloblastomas and 1 ependymoma.
Main Results:
- The telovelar approach was employed for all 15 patients with fourth ventricle tumors.
- Postoperative complications such as ataxia and mutism were observed, particularly in cases involving large tumors.
Conclusions:
- A thorough understanding of neuroanatomy is essential for meticulous dissection and minimizing morbidity during fourth ventricle tumor surgery.
- Staged dissection of the uvulotonsillar cleft can mitigate the risk of postoperative ataxia and mutism associated with the telovelar approach for large tumors.
