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External auditory canal:
exostoses, malignant otitis externa, atresia
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Clivus mass:
chordoma, chondrosarcoma, plasmacytoma, mets, lymphoma, FD, EG
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Petrous apex mass:
cholesterol granuloma, mucocele, petrous apicitis, epidermoid, mets, myeloma, chondrosarcoma, meningioma, aneurysm
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Soft tissue mass in middle ear:
cholesteatoma, cholesterol granuloma, glomus tympanicum tumor, aberrant ICA, high or dehiscent jugular bulb
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Intracanalicular IAC masses: exclusively intracanalicular �
acoustic neuroma, facial neuroma, hemangioma, lipoma;
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Intracanalicular IAC masses: not primarily intracanalicular �
meningioma, epidermoid
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