AbstractBackground and purpose For skull base tumors, target definition is the key to safe high-dose treatments because surrounding normal tissues are very sensitive radiation. In present work we established a joint ESTRO ACROP guideline for volume of tumors. Material methods A comprehensive literature search was conducted in PubMed using various combinations followin...

Schwannomas are usually characterized by a mass that displays rapid and intense contrast enhancement on computed tomography (CT) and magnetic resonance (MR) imaging. Although some cases are associated with cyst formation, a solid component is nearly always visualized. Schwannomas can be associated with any nerve. Schwannomas of the ninth, 1Oth, and 11th cranial nerves, also called neurinomas of...

PROBLEM Approximately 90% of tumours of cerebellopontine angle and internal auditory canal are vestibular schwannomas (acoustic neuromas) and meningiomas. Lipochoristomas are rare benign masses that represent only 0.15% of cases. METHODOLOGY We report the case of a 39-year-old man who consulted us for right-sided hearing loss and tinnitus. RESULTS Tonal audiometry showed a down-sloping righ...

Current prosthetic devices to restore hearing sense of patients with bilateral acoustic neuromas aren’t always effective, because we don’t have sufficient knowledge of the auditory pathways and the Cochlear Nucleus (CN) functions to stimulate the Cochlear Nucleus functionally. Our goals are to enhance our understanding of such functions and to develop effective stimulating strategies of the CN....

Scatter plots showing the amplitude versus velocity (maximum and average) relationship of horizontal saccades in 25 normal subjects and four groups of patients were statistically compared. Three patients with "subclinical" medial longitudinal fasciculus syndromes had significant slowing of adducting saccades, and two of these patients had unsuspected slowing of abducting saccades (although to a...

The purpose of this study was to determine whether clicks presented in rarefaction or condensation modes produce more accurate diagnostic information. Subjects were 20 consecutive patients who were seen at the Mayo Clinic for unilateral acoustic neuromas. The nontumor ear served as a control to minimize intersubject variability in the latencies. A standard audiologic evaluation was followed by ...

Tumours of the jugular foramen are rare and much less common than the acoustic neuromas. Glomusjugulare is the commonest type of tumour at this site while other tumours include Schwannomas, meningiomas, epidermoids, metastatic carcinomas, chordoinas and osteoclastomas. A case of ectopic glioma was reported in 1976. Neunnomas have a marked predilection for young females and occur most frequently...