Nasopharyngeal Angiofibroma

ICD-O:9160/0

Nasopharyngeal angiofibromas (or juvenile nasopharyngeal angiofibromas) are rare benign tumours with an incidence of 0.5% of all head and neck tumours. They occur exclusively in adolescent males and become clinically evident between 10 and 25 years of age with nose bleeds, respiratory distress, headaches or sometimes visual disturbances. Nasopharyngeal angiofibromas arise from the posterior lateral wall of the nasal cavity near the pterygo-palatine fossa at the superior margin of the foramen sphenopalatinum and extend into adjacent structures such as maxillary, sphenoid or ethmoid sinuses and the nasal cavity. The most advanced cases show intracranial extension [153, 203]. The blood supply of nasopharyngeal angiofibromas comes from the external carotid artery with the internal maxillary artery as feeding branch. In a minority of cases, the feeding vessels are the sphenopalatine artery and the ascending pharyngeal artery [75, 153]. Diagnosis of a nasopha-ryngeal angiofibroma is based on clinical examination and computer tomography, which shows two consistent features: 1) localisation in the posterior nasal cavity and pterygopalatine fossa, and 2) bone erosions of the

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