Acoustic neuroma staging: Difference between revisions
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'''WIGAND''' has defined a trinomial classification: | '''WIGAND''' has defined a trinomial classification: | ||
'''Tumour size stage A: '''The | '''Tumour size stage A: '''The tumor is limited to the inner auditory passage and is 1-8 mm (average diameter) in size. | ||
'''Tumour size stage B:''' The | '''Tumour size stage B:''' The tumor has spread up to the cerebellopontine angle and is 9-25 mm in size. | ||
'''Tumour size stage C:''' The | '''Tumour size stage C:''' The tumor has spread to the brainstem and is bigger than 25 mm. | ||
{| style="border: 0px; font-size: 90%; margin: 3px; width: 600px" align=center | |||
|valign=top| | |||
|+ | |||
! style="background: #4479BA; width: 200px;" | {{fontcolor|#FFF|Stage}} | |||
! style="background: #4479BA; width: 400px;" | {{fontcolor|#FFF|Tumor size}} | |||
! style="background: #4479BA; width: 400px;" | {{fontcolor|#FFF|Tumor location}} | |||
|- | |||
| style="padding: 5px 5px; background: #DCDCDC; font-weight: bold" | | |||
:Stage A | |||
| style="padding: 5px 5px; background: #F5F5F5;" |1-8 mm in size | |||
| style="padding: 5px 5px; background: #F5F5F5;" |The tumor is limited to the inner auditory passage | |||
|- | |||
| style="padding: 5px 5px; background: #DCDCDC;font-weight: bold" | | |||
:Stage B | |||
| style="padding: 5px 5px; background: #F5F5F5;" |9-25 mm in size | |||
| style="padding: 5px 5px; background: #F5F5F5;" |The tumor has spread up to the cerebellopontine angle | |||
|- | |||
| style="padding: 5px 5px; background: #DCDCDC;font-weight: bold" | | |||
:Stage C | |||
| style="padding: 5px 5px; background: #F5F5F5;" |Greater than 25 mm in size | |||
| style="padding: 5px 5px; background: #F5F5F5;" |The tumor has spread to the brainstem | |||
|- | |||
|} | |||
'''SAMII''' defines six tumour classes: | '''SAMII''' defines six tumour classes: | ||
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'''T4b:''' Tumour compromises the brainstem and displaces the four ventricles (cerebral ventricle) | '''T4b:''' Tumour compromises the brainstem and displaces the four ventricles (cerebral ventricle) | ||
{| style="border: 0px; font-size: 90%; margin: 3px; width: 600px" align=center | |||
|valign=top| | |||
|+ | |||
! style="background: #4479BA; width: 200px;" | {{fontcolor|#FFF|Stage}} | |||
! style="background: #4479BA; width: 400px;" | {{fontcolor|#FFF|Tumor location}} | |||
|- | |||
| style="padding: 5px 5px; background: #DCDCDC; font-weight: bold" | | |||
:T1 | |||
| style="padding: 5px 5px; background: #F5F5F5;" |Clear intrameatal tumour (in the bony ear canal) | |||
|- | |||
| style="padding: 5px 5px; background: #DCDCDC;font-weight: bold" | | |||
:T2 | |||
| style="padding: 5px 5px; background: #F5F5F5;" |Intra and extrameatal tumour part (within and outside of the bony ear canal) | |||
|- | |||
| style="padding: 5px 5px; background: #DCDCDC;font-weight: bold" | | |||
:T3a | |||
| style="padding: 5px 5px; background: #F5F5F5;" |Tumor fills the cerebellopontine cistern (between the cerebellum and brainstem) | |||
|- | |||
| style="padding: 5px 5px; background: #DCDCDC;font-weight: bold" | | |||
:T3b | |||
| style="padding: 5px 5px; background: #F5F5F5;" |Tumor reaches the brainstem | |||
|- | |||
| style="padding: 5px 5px; background: #DCDCDC;font-weight: bold" | | |||
:T4a | |||
| style="padding: 5px 5px; background: #F5F5F5;" |Tumor compromises the brainstem | |||
|- | |||
| style="padding: 5px 5px; background: #DCDCDC;font-weight: bold" | | |||
:T4b | |||
| style="padding: 5px 5px; background: #F5F5F5;" |Tumor compromises the brainstem and displaces the four ventricles (cerebral ventricle) | |||
|- | |||
|} |
Revision as of 16:13, 2 October 2015
Acoustic neuroma Microchapters | |
Diagnosis | |
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Treatment | |
Case Studies | |
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]
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 tumor is limited to the inner auditory passage and is 1-8 mm (average diameter) in size.
Tumour size stage B: The tumor has spread up to the cerebellopontine angle and is 9-25 mm in size.
Tumour size stage C: The tumor has spread to the brainstem and is bigger than 25 mm.
Stage | Tumor size | Tumor location |
---|---|---|
|
1-8 mm in size | The tumor is limited to the inner auditory passage |
|
9-25 mm in size | The tumor has spread up to the cerebellopontine angle |
|
Greater than 25 mm in size | The tumor has spread to the brainstem |
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)
Stage | Tumor location |
---|---|
|
Clear intrameatal tumour (in the bony ear canal) |
|
Intra and extrameatal tumour part (within and outside of the bony ear canal) |
|
Tumor fills the cerebellopontine cistern (between the cerebellum and brainstem) |
|
Tumor reaches the brainstem |
|
Tumor compromises the brainstem |
|
Tumor compromises the brainstem and displaces the four ventricles (cerebral ventricle) |