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Arch Otolaryngol Head Neck Surg. 2006;132:104.

	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

Diagnosis: Intracranial schwannoma originating from the greater petrosal nerve

The petrous apex together with the ventral part of the middle cranial fossa can be involved in congenital, infectious, inflammatory, and neoplastic processes. A lesion may remain undetected for a long time because patients often complain of indistinct symptoms that may delay diagnosis. Clinical presentations can range from otitis media, trigeminal paresthesia or numbness, and headache or eye pain due to stretching of the dura. Tinnitus, vertigo, hearing loss, ophthalmoplegia, and facial paralysis can also occur. Because direct examination is not possible, careful attention to the subtle symptoms is extremely important. The greater petrosal nerve carries parasympathetic fibers of the facial nerve. It leaves the facial nerve at the geniculate ganglion via the hiatus of the greater petrosal nerve, which is found in the middle cranial fossa. The greater petrosal nerve passes forward across the foramen lacerum, where it is joined by the deep petrosal nerve (sympathetic from superior cervical . . . [Full Text of this Article]

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