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| __FORCETOC__
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| {{Acoustic neuroma}}
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| {{CMG}}
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| ==Overview==
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| Acoustic neuroma may be classified into three subtypes based on tumor size and into six subtypes based on tumor location.
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| ==Staging==
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| Acoustic neuroma may be classified into three subtypes based on tumor size and into six subtypes based on tumor location.
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| *'''WIGAND''' has defined a trinomial classification:
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| '''SAMII''' defines six tumour classes:
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| {| class="wikitable"
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| |+
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| !Grade
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| !Tinnitus grading system for acoustic neuromas
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| |-
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| |I
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| |No tinnitus
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| |-
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| |II
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| |Intermittent or mild tinnitus, can only be heard when the ambient noise is low
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| |-
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| |III
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| |Persistent or moderate tinnitus, can be heard every day
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| |-
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| |IV
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| |Persistent and severe tinnitus, interfere with work and sleep
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| |}
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| {| class="wikitable"
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| ! colspan="2" |Dizziness grading system for acoustic neuromas.
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| |-
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| |Grade
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| |Descriptions
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| |-
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| |I
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| |No dizziness or imbalance
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| |-
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| |II
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| |Occasional and mild dizziness or imbalance
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| |-
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| |III
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| |Persistent or moderate vertigo or imbalance
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| |-
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| |IV
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| |Persistent and severe dizziness or imbalance, disturbing daily life
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| |}
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|
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| {| style="border: 0px; font-size: 90%; margin: 3px; width: 600px" align="center"
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| | valign="top" |
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| |+
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| ! style="background: #4479BA; width: 200px;" | {{fontcolor|#FFF|Stage}}
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| ! style="background: #4479BA; width: 400px;" | {{fontcolor|#FFF|Tumor location}}
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| |-
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| | style="padding: 5px 5px; background: #DCDCDC; font-weight: bold" |
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| :T1
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| | style="padding: 5px 5px; background: #F5F5F5;" |Clear intrameatal tumour (in the bony ear canal)
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| |-
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| | style="padding: 5px 5px; background: #DCDCDC;font-weight: bold" |
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| :T2
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| | style="padding: 5px 5px; background: #F5F5F5;" |Intra and extrameatal tumour part (within and outside of the bony ear canal)
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| |-
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| | style="padding: 5px 5px; background: #DCDCDC;font-weight: bold" |
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| :T3a
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| | style="padding: 5px 5px; background: #F5F5F5;" |Tumor fills the cerebellopontine cistern (between the cerebellum and brainstem)
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| |-
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| | style="padding: 5px 5px; background: #DCDCDC;font-weight: bold" |
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| :T3b
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| | style="padding: 5px 5px; background: #F5F5F5;" |Tumor reaches the brainstem
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| |-
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| | style="padding: 5px 5px; background: #DCDCDC;font-weight: bold" |
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| :T4a
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| | style="padding: 5px 5px; background: #F5F5F5;" |Tumor compromises the brainstem
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| |-
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| | style="padding: 5px 5px; background: #DCDCDC;font-weight: bold" |
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| :T4b
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| | style="padding: 5px 5px; background: #F5F5F5;" |Tumor compromises the brainstem and displaces the four ventricles (cerebral ventricle)
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| |-
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| |}
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| ==References==
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| {{reflist|2}}
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| {{WikiDoc Help Menu}}
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| {{WikiDoc Sources}}
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| [[Category:Types of cancer]]
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| [[Category:Disease]]
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| [[Category:Up-To-Date]]
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| [[Category:Oncology]]
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| [[Category:Medicine]]
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| [[Category:Otolaryngology]]
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| [[Category:Neurology]]
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| [[Category:Neurosurgery]]
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