Acoustic neuroma staging: Difference between revisions
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{{Acoustic neuroma}} | {{Acoustic neuroma}} | ||
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'''WIGAND''' has defined a trinomial classification: | '''WIGAND''' has defined a trinomial classification: | ||
Revision as of 17:37, 1 October 2015
Acoustic neuroma Microchapters | |
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Acoustic neuroma staging On the Web | |
American Roentgen Ray Society Images of Acoustic neuroma staging | |
Risk calculators and risk factors for Acoustic neuroma staging | |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] WIGAND has defined a trinomial classification:
Tumour size stage A: The tumour is limited to the inner auditory passage and is 1-8 mm (average diameter) in size.
Tumour size stage B: The tumour has spread up to the cerebellopontine angle and is 9-25 mm in size.
Tumour size stage C: The tumour has made contact with the brainstem and is bigger than 25 mm.
SAMII defines six tumour classes:
T1: clear intrameatal tumour (in the bony ear canal)
T2: intra and extrameatal tumour part (within and outside of the bony ear canal)
T3a: Tumour fills the cerebellopontine cistern (between the cerebellum and brainstem)
T3b: Tumour reaches the brainstem
T4: Tumour compromises the brainstem
T4b: Tumour compromises the brainstem and displaces the four ventricles (cerebral ventricle)