Acoustic neuroma staging: Difference between revisions
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{{Acoustic neuroma}} | {{Acoustic neuroma}} | ||
{{CMG}} | {{CMG}} | ||
==Overview== | |||
Acoustic neuroma may be classified into three subtypes based on tumor size and into six subtypes based on tumor location. | |||
==Staging== | |||
Acoustic neuroma may be classified into three subtypes based on tumor size and into six subtypes based on tumor location. | |||
'''WIGAND''' has defined a trinomial classification: | '''WIGAND''' has defined a trinomial classification: | ||
Revision as of 15:55, 2 October 2015
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Acoustic neuroma Microchapters | |
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Diagnosis | |
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Treatment | |
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Case Studies | |
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Acoustic neuroma staging On the Web | |
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American Roentgen Ray Society Images of Acoustic neuroma staging | |
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Risk calculators and risk factors for Acoustic neuroma staging | |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Acoustic neuroma may be classified into three subtypes based on tumor size and into six subtypes based on tumor location.
Staging
Acoustic neuroma may be classified into three subtypes based on tumor size and into six subtypes based on tumor location.
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)