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Results for “Cranial Nerve Neoplasms”

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At least 19 recordsLinked to original sources
PubMed1979

Computed tomography of the visual pathways.

Many articles have discussed the anatomy and pathology of the orbits. Although this area is exquisitely visualized via computed tomography, the bulk of the visual apparatus lies behind the optic canal. A variety of pathologic conditions will manifest themselves by changes in the visual fields. This article demonstrates the normal anatomy of the visual pathways within the brain by CT scanning and correlates various changes that cause visual field defects.

Adult↗
PubMed2001

Extracranial lower cranial nerve sheath tumors.

OBJECTIVE: The purpose of this article is to review the clinicoradiographic features of lower cranial nerve sheath tumors and to outline surgical approaches that allow the safe and complete resection of these lesions. METHODS: Thirteen patients with lower cranial nerve sheath tumors of the infratemporal fossa were surgically treated between 7/88 and 10/99. A retrospective chart analysis provided details pertaining to clinical manifestations, radiographic assessment, intraoperative findings, tumor histology, and postoperative results. RESULTS: The most common presenting symptoms were neck pressure and voice change while submucosal palatal fullness and vocal cord paralysis were the most common presenting signs. All tumors were removed via lateral skull base approaches and the most common postoperative sequelae was dysphasia. CONCLUSION: Lower cranial nerve sheath tumors of the infratemporal fossa usually reach considerable size before diagnosis because of a naturally slow growth rate in this relatively silent location. The safe surgical removal of these tumors, based on superior control of the internal carotid artery, can be achieved through the use of contemporary lateral skull base techniques.

Adult↗
PubMed1997

Neurosarcoma of the face: MRI.

Neurosarcoma is a rare tumour originating from the sheath of peripheral nerves. Facial lesions have been reported in about 20 patients. We describe the MRI appearances of neurosarcoma with histological correlation in three patients. The lesions lay in the submandibular region, the left parapharyngeal space and the right orbit. MRI showed a well-defined mass with mixed components. The lesions were moderately heterogeneous on T1-weighted images in two cases and on T2-weighted images in all cases. Gadolinium enhancement occurred in all cases to variable degrees. In two cases, small high signal foci were seen on T2-weighted sequences. MRI appearances of neurosarcoma are not specific.

Adolescent↗
PubMed1985

Neurotropic melanoma of the head and neck.

Neurotropic melanoma is a lesion which simulates a cutaneous fibrous tumor whose clinical course is characterized by local infiltration, multiple recurrences, and commonly by metastasis. Like adenoid-cystic tumors of the head and neck, the neurotropic melanoma has a predilection for perineural invasion and extension along peripheral nerves. Its microscopic picture is characterized by atypical "neuroma-like" patterns of Schwann cells and spindle cells, by poorly defined margins, and by neurotropism. Lentigo malignant melanoma (LMM) is a precursory lesion. The neurotropic melanoma is of particular interest to the head and neck surgeon because in the less than 50 reported cases of this rare tumor the preponderant sites were head, neck, and lip. We report two cases of neurotropic melanoma of the head and neck which demonstrate the characteristic perineural invasion of cranial nerves and extension along cranial nerves to the central nervous system. The clinical and pathologic features of the neurotropic melanoma are reviewed and the key diagnostic and therapeutic considerations in these patients are discussed.

Adult↗
PubMed1997

Lower cranial nerve schwannomas involving the jugular foramen.

Schwannomas involving the jugular foramen are rare lesions, and no consensus exists on their management. This paper reports on 20 such cases treated in our centers. Nineteen cases were operated on for removal of the tumors, and the remaining case is being managed by watchful expectancy. Fifteen cases were operated on by the petro-occipital trans-sigmoid approach with or without labyrinthectomy, 2 by the infratemporal fossa approach, 1 by the modified transcochlear approach, and 1 by the jugulo-petrosectomy approach. The petro-occipital trans-sigmoid approach allowed single-stage, total tumor removal with preservation of the facial nerve and of middle and inner ear functions. Lower cranial nerve paralysis was the major complication and seemed to be inherent to the disease rather than to the approach used. No cerebrospinal fluid leak or meningitis occurred in the present series. So far, no recurrence has been detected.

Adult↗