| CODE/DESCRIPTION | 
- 
- DESCRIPTION:    In situ
 
 
- 
- DESCRIPTION:    Unknown if extension or metastasis
 
 
- 
- DESCRIPTION:    Supratentorial/Cerebral Hemisphere/1 side
 
 
- 
- DESCRIPTION:    Infratentorial/Cerebellum/1 side
 
 
- 
- DESCRIPTION:    Infratentorial/Brain stem/1 side
 
 
- 
- DESCRIPTION:    Confined to brain/meninges, NOS
 
 
- 
- DESCRIPTION:    Both cerebellum & brain stem
 
 
- 
- DESCRIPTION:    Ventricles/Ventricular system
 
 
- 
- DESCRIPTION:    Crosses midline/corpus callosum/contralateral hemi
 
 
- 
- DESCRIPTION:    Supratentorial to cerebellum or brain stem
 
 
- 
- DESCRIPTION:    Infratentorial to cerebrum
 
 
- 
- DESCRIPTION:    Skull/Dura/Vessels/Nerves
 
 
- 
- DESCRIPTION:    Nasopharynx/Posterior pharynx/Nasal cavity/CNS/CSF
 
 
- 
- DESCRIPTION:    Further contiguous extension
 
 
- 
- DESCRIPTION:    Metastasis
 
 
 
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