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At least 181 records · Page 10Linked to original sources
PubMed1988

[A new CT technic in the study of intracanalicular neurinoma of the acoustic nerve. Preliminary report].

A preliminary report is presented on a new technique for the detection and the diagnosis of intracanalicular acoustic neuromas. The technique consists of preliminary CT scans on petrous bones, after iv administration of a bolus of contrast medium. The scans are performed at a predetermined level of the middle portion of the internal auditory canals. The early enhancement is then evaluated of the soft tissues contained into the auditory canal on the side with retrocochlear neurosensory hypoacusis. The images obtained are then processed by an image processing program, thus enhancing the contrast resolution and allowing an optimal depiction of the lesion. In the past 10 months, 67 patients with clinical suspicion of acoustic neuromas were studied. This technique allowed the diagnosis of 2 acoustic neuromas with a purely intracanalicular involvement.

Evaluation Studies as Topic↗
PubMed1987

Acoustic nerve tumor surgery before and since the laser: comparison of results.

A random computer selection of 21 patients who underwent 28 operations for acoustic neurinoma between 1974 and 1980 using conventional methods, including the operating microscope and microtechnique, was compared with a cohort of 22 patients who underwent 25 operations between 1980 and 1984 utilizing a carbon dioxide laser. Completeness of tumor removal, anatomical and functional preservation of the facial nerve, preservation of hearing, morbidity and mortality, average hospital stay, and eventual outcome were used as markers and were compared. Utilizing P values, the study demonstrated a significantly superior outcome, and as a result a better life quality, in patients who were operated on utilizing a CO2 laser in addition to conventional microsurgical technique.

Adult↗
PubMedDate not supplied

[Auditory evoked potentials from brain stem determined in acoustic nerve neurinomas].

An analysis of the studies of Brain Stem Electric Response Audiometry of patients operated on Bachaumont Clinic or in Cochin hospital in Paris, because of acoustic neurinoma, was carried out. The studies comprised 88 patients divided into groups according to the size of tumour. A group of small intrameatal tumours, a group of up to 2 cm tumours, a group of between 2 and 3 cm tumours and a group of above 3 cm tumours. A control group of examined patients consisted of 20 persons with one-side acoustic impairment or two-side impairment but predominant on one side and patients with one-side tinnitus or two-side tinnitus but predominant on one side. Examinations of these patients made with CT and NMR did not show presence of acoustic neurinoma. BERA's tests did not show a response in case of 22 patients with acoustic neurinoma. In 71% of cases BERA's tests showed an extrahelix type, for which in 50% of cases a prolonged latency on the side of the tumour was found. In 4% of cases Brain Stem Electric Response Audiometry gave results within normal range both with respect to morphology and latency time of each wave. A slight correlation between the size of tumour and type of BERA change was found.

Adolescent↗
PubMed1989

Bilateral internal auditory canal enlargement without acoustic nerve tumor in von Recklinghausen neurofibromatosis.

The common (and definitive) intracranial tumors in patients with one form of neurofibromatosis (NF), bilateral acoustic NF (NF-2), are bilateral acoustic neuromas. In this study, we present 2 cases with what appears to be another form of NF, namely, NF-1, who showed bilateral enlargement of the internal auditory canals. Bilateral caloric responses were remarkably impaired in both cases; a unilateral sensorineural hearing loss was observed in 1. No tumor was demonstrated in the enlarged internal auditory canals in either case. Although the pathophysiology remains uncertain, some patients with NF-1 show abnormal cochleovestibular function in association with bilateral internal auditory canal enlargement without an acoustic tumor.

Child↗
PubMedDate not supplied

[Neurinomas of the acoustic nerve and surgery with the suboccipital approach. A study of 70 cases].

The Authors report 70 cases of medium and large size acoustic neuromas, operated on using the suboccipital approach, the only one which allows their total extirpation. Total extirpation was performed in 77% of the patients. The Authors analyze the clinical picture, the neuroradiological diagnostic procedures and the surgical techniques used in the treatment of these lesions.

Adolescent↗