BACKGROUND There is an increased risk for labyrinthine injury for the resection of acoustic neuromas (AN) on the suboccipital, retrosigmoid approach. Prognostic factors should be analyzed for the postoperative hearing function. METHODS We examined 51 patients with ANs using preoperative intact hearing function. Audiological data were obtained by pure tone audiogram (PTA) and speech audiogram....

PURPOSE To investigate the role of dynamic MR imaging in the differentiation of neuromas and meningiomas. METHODS Eleven patients with neuromas and 15 patients with meningiomas underwent dynamic contrast-enhanced MR imaging using a short TE FLASH sequence and a bolus injection of Gd-DTPA. RESULTS There was no significant difference between these tumors in the signal-enhancement increment at...

OBJECTIVES Assess p63 and p73 expression in acoustic neuroma and its correlation with clinical and radiological findings. MATERIALS AND METHODS medical records of 34 patients who were operated on for acoustic neuroma during a 3-year period (2001-2003) were evaluated retrospectively. Immunohistochemical analysis of the schwannoma was performed with p63 and p73 antibodies and clinical patient c...

OBJECTIVE The objective of this study was to assess the epidemiology of acoustic neuroma and determine current trends in therapy using tumor registry techniques. STUDY DESIGN Analysis of a national database. SUBJECTS AND METHODS The Surveillance Epidemiology and End Results (SEER) database is a national tumor registry that began to identify and abstract benign and borderline tumors of the b...

BACKGROUND Gamma Knife radiosurgery (GKRS) is an important part of the neurosurgical armamentarium in the treatment of acoustic neuromas. However, the treatment outcome related to the morphology of the tumor has not been rigorously studied. In this cohort, we evaluated the morphological features of the tumor in the tumor response and neurological outcomes after GKRS. MATERIAL AND METHODS From...

When acoustic neuromas are found in younger age groups, they are typically bilateral and associated with neurofibromatosis (NF). A unilateral acoustic neuroma in a child or adolescent without NF is rare. We report audiometric, auditory brainstem response (ABR) and magnetic resonance imaging (MRI) data for a 15-year-old male with an acoustic neuroma but without associated NF. The patient was see...

In pig production, piglets are tail docked at birth in order to prevent tail biting later in life. In order to examine the effects of tail docking and docking length on the formation of neuromas, we used 65 pigs and the following four treatments: intact tails (n=18); leaving 75% (n=17); leaving 50% (n=19); or leaving 25% (n=11) of the tail length on the pigs. The piglets were docked between day...