Abstract:
OBJECTIVE:Lesions of the cerebellomedullary cistern lateral to the lower brainstem in an area extending from the foraminae of Luschka to the foramen magnum are rare and can be caused by various sources. There is no consensus on an ideal surgical approach. We describe the anatomical features and the surgical technique of the midline suboccipital subtonsillar (STA) approach to the cerebellomedullary cistern and its pathologies. METHODS:The study was performed on three alcohol (ETOH)-fixed specimens (6 sides), and the technique of the approach was highlighted. The tonsillar retraction needed to view the important structures was measured. Additionally, the records of 31 patients who underwent the STA procedure were evaluated. We provide three clinical cases as examples. RESULTS:Tonsillar retraction of 0.3cm (SD±0.1cm) exposed the PICA with its telo-velo-tonsillar and cortical branches. Retraction of 0.4cm (SD±0.2cm) exposed the spinal root of CN XI. Retraction of 0.9cm (SD±0.01cm) exposed the hypoglossal canal. Retraction of 1.3cm (SD±0.2cm) exposed the root exit zone of the glossopharyngeal nerve. Retraction of 1.6cm (SD±0.3cm) exposed the jugular foramen (JF), and retraction of 2.4cm (SD±0.2cm) exposed the inner auditory canal (IAC). In all of the selected cases, the pathology could be reached and exposed using the STA. CONCLUSIONS:We recommend STA as a straightforward, easy-to-learn and therefore time-saving and safe procedure compared with other standard approaches to the cerebellomedullary cistern and its pathologies.
journal_name
Clin Neurol Neurosurgjournal_title
Clinical neurology and neurosurgeryauthors
Herlan S,Ebner FH,Nitz A,Hirt B,Tatagiba M,Roser Fdoi
10.1016/j.clineuro.2014.07.029subject
Has Abstractpub_date
2014-10-01 00:00:00pages
98-105eissn
0303-8467issn
1872-6968pii
S0303-8467(14)00289-3journal_volume
125pub_type
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