L'Autore ha cercato di riassumere l'ampio spettro della patologia espansiva che colpisce l'osso temporale, la piramide petrosa e la mastoide corroborando la descrizione con casistica personale. Per semplicità si è ritenuto opportuno suddividere tale trattazione seguendo uno schema anatomo-topografico più caro agli otorinolaringoiatri per cui è stata descritta prima la patologia dell'orecchio esterno, poi dell'orecchio medio e infine di quello interno considerando in ogni contesto le lesioni spazio occupanti piu frequenti e i loro caratteri distintivi e differenziali. Alcune patologie non sono state descritte diffusamente perché meglio trattate in altra letteratura o per evitare ripetizioni nel testo, ma di tutte si è cercato di chiarire i caratteri che ne consentano il riconoscimento.
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