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NeoplasmMalignant PrimaryMalignant SecondaryCa In SituBenignUncertainUnspecified Behavior
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occipital
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⠗ bone
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⠓ lobe or pole, brain
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odontogenic – see Neoplasm, jaw bone
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olfactory nerve or bulb
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olive (brain)
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omentum
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operculum (brain)
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optic nerve, chiasm, or tract
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oral (cavity)
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⠗ ill-defined
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⠓ mucosa
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orbit
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⠗ autonomic nerve
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⠗ bone
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⠗ eye
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⠗ peripheral nerves
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⠓ soft parts
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organ of Zuckerkandl
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oropharynx
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⠗ branchial cleft (vestige)
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⠗ junctional region
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⠗ lateral wall
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⠗ overlapping lesion
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⠗ pillars or fauces
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⠗ posterior wall
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⠓ vallecula
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os
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⠗ external
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⠓ internal
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ovary
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oviduct