[Computed tomography in the diagnosis of cerebellopontine angle tumors: CT, cerebellopontine angle tumor and acoustic neurinoma (author's transl)].
Explore the source record for details and available documents.
Adolescent↗
SEARCH · PubMed Health
Results for “Cerebellopontine Angle”
Explore indexed PubMed citations for clinical trials, systematic reviews and public health research. Read source abstracts and follow each citation to its original PubMed record.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Intracranial lipoma. Report of a case and differentiation from other tumours of the cerebellopontine angle.
Teratomata of the cerebellopontine angle are rare. A case of a lipoma of this localization occurring in a 50-year-old man with an interesting case history is reported. The differential diagnosis of tumours of the internal auditory meatus and the surrounding structures is discussed. In cases with an uncharacteristic clinical history suggesting involment of the VIIIth cranial nerve, it is important to focus attention on the existence of rare lesions of the internal acoustic porus. The diagnosis can only be established with operation and biopsy.
Cerebellar Neoplasms↗
[Microtopography of cerebellopontine angle structures in acoustic neuroma].
The structures of the cerebellopontine angle in neurinoma of the auditory nerve were studied in autopsy material and during surgical intervention with the use of an operative microscope. Principally different variants of the relationships between the cerebellopontine angle structures and the neurinoma capsule in intra- and extracisternal localization of the tumor were revealed. The greatest difficulties occur in exposure of the capsule of an intracisternal neurinoma which is tightly connected with the structures of the cerebellopontine angle by means of strong connective-tissue trabeculae. In extracisternal localization of the tumor its capsule is easily separated from the arachnoid, which is pushed to the brain stem, because there are no trabeculae between these structures. The main source of blood supply to the tumor irrespective of its localization is the anterior inferior cerebellar artery.
Arachnoid↗
Facial nerve repair in cerebellopontine angle surgery.
Facial nerve continuity was restored during cerebellopontine angle tumor removal in nine cases. The distal facial nerve was rerouted from the stylomastoid foramen into the cerebellopontine angle. Direct suture was accomplished in seven cases while two required interposition of a greater auricular nerve graft. There was excellent return of facial function in eight of the nine cases. Overall results are superior to nerve substitution techniques. The facial nerve should be inspected for continuity following tumor removal. If one is not certain the nerve is intact, the proximal facial stump should be identified at the brain stem and facial nerve continuity reestablished. A nerve substitution procedure should be resorted to a later time only when the proximal facial stump is not identifiable.
Adult↗
Primary choroid plexus papilloma of the cerebellopontine angle presenting as brain stem tumor in child.
A case of a primary choroid plexus papilloma of the cerebellopontine angle in an 8-year-old female is presented. The clinical features of progressive cranial nerve palsies and cerebellar signs in the absence of intracranial hypertension initially suggested an intrinsic brain stem lesion. Whereas a radionuclide brain scan demonstrated abnormal uptake in the region of the pons, vertebral angiography and pneumoencephalography were diagnostic of an angle mass. At surgery, the tumor proved to be a choroid plexus papilloma that was totally confined to the cerebellopontine angle. This patient represents the thirteenth reported case of a primary cerebellopontine angle papilloma and the first such case occurring in a child.
Brain Neoplasms↗
A one-stage combined approach for the management of large cerebellopontine angle tumors.
This paper reviews 180 cerebellopontine angle lesions in regard to results and complications of the surgical management with special emphasis on the diagnosis, surgical removal, and results in 60 large (4 cm. or greater) tumors of the CPA. The authors conclude that in their experience a one-stage combined translabyrinthine-suboccipital approach, which is explained in detail, is the procedure of choice in dealing with large tumors of the CPA.
Adolescent↗
[Radiodiagnosis of cerebellopontine-angle tumors (author's transl)].
The most important radiodiagnostic signs of cerebellopontine-angle tumors are demonstrated. The value of plain films and special projections is discussed. The use of recent diagnostic procedures like scintography, CT and cisternography with oily contrast medium is critically analyzed. The advantage and disadvantages of these procedures are discussed according to their usefullness in evaluating size, route of spread and localisation of cerebellopontine-angle tumors.
Cerebellar Neoplasms↗
Angiographic diagnosis of intra- and extraaxial tumors in the cerebellopontine angle.
Angiography is an effective diagnostic modality in the evaluation of patients with suspected cerebellopontine angle tumor, particularly when there is not a clear clinical differentiation between an intraaxial and an extraaxial mass, or when the patient presents with increased intracranial pressure. In a series of 17 extraaxial masses in the cerebellopontine angle and 2 cerebellar tumors which presented into the angle, the most common angiographic findings were: 1. elevation and/or medial displacement of the proximal portions of the superior cerebellar artery; this finding was seen only in the extraaxial tumors and has not been demonstrated with intraaxial masses; 2. downward, medial, and posterior displacement of the proximal portions of the posterior inferior cerebellar artery; 3. lateral displacement and stretching of the hemispheric branches of both the superior cerebellar and posterior inferior cerebellar arteries; and 4. displacement of the vein of the lateral recess and of the petrosal vein either downward and medially or upward and laterally.
Brain Neoplasms↗
[Otological possibilities of conservation and reconstruction of facial function in operations within the internal auditory canal and the cerebellopontine angle (author's transl)].
Description of the possibilities of operations within the internal auditory canal and the cerebellopontine angle, especially of the removal of acoustic neuromas by transtemporal and translabyrinthine approach. Besides at the total removal of the tumor the operative technique aims at the conservation of the facial nerve and its function. The transtemporal approach is recommended only for the removal of small tumors limited to the internal auditory canal. If the tumor originates from the vestibular nerve, the facial and cochlear nerve can be preserved by this procedure. The translabyrinthine approach implicate the complete unilateral deafness but is available even for the removal of bigger tumors leaving the internal auditory canal in the direction of the cerebello-pontine angle. Sketches and operation slides illustrate details of the operative preparation. Special difficulties occuring in the cerebellopontine angle are demonstrated. Clinical and diagnostic problems in relation to the operation planning are discribed. The cooperation between otosurgeon and neurosurgeon is indispensable
Cerebellopontine Angle↗
The diagnosis and management of cerebellopontine angle tumors.
The diagnosis and surgical management of cerebellopontine angle tumors remains a challenge. Early detection and microsurgical technique have lowered mortality rates and have allowed surgeons to preserve facial nerve function in a high percentage of cases. The purpose of this paper is to report a series of 171 lesions removed through the middle fossa, translabyrinthine, and combined translabyrinthine-suboccipital approaches. Results and complications are covered in detail.
Adolescent↗
Cerebellopontine angle meningioma presenting as subarachnoid haemorrhage.
Two cases of cerebellopontine angle meningioma causing subarachnoid haemorrhage are described. Their clinical and pathological significance is discussed.
Brain Neoplasms↗
Microsurgical approach to the cerebellopontine angle.
Various sections of the IXth, Vth, vestibular and cochlear nerves have been performed on twenty patients. The technique we used was an 'a minima' approach to the cerebellopontine angle. This operation is atraumatic and quick to perform, and the postoperative period is always excellent. It seems very useful for patients with Ménière's disease or intractable pains in the glossopharyngeal or trigeminal fields. It can be used for diagnosis if a small neurinoma in the cerebellopontine angle is suspected.
Aged↗
Iophendylate cisternography in diagnosis of cerebellopontine angle tumors. Report of 60 cases.
60 cases of bilateral cerebellopontine angle pantopaque cisternography done between May, 1972, and April, 1974, are reported. Of these, 9 showed a unilateral acoustic neurinoma of different sizes, 1 showed a bilateral acoustic neurinoma all confirmed by operation. Technical details and advantages of the procedure are discussed. There were no complications related to the procedure.
Adult↗
Suboccipital surgical approach to the cerebellopontine angle and internal auditory canal.
The suboccipital craniectomy done with the patient in the prone position using modern microsurgical methods gives good anatomical exposure essential for efficient, accurate, total removal of cerebellopontine angle neoplasms and allows adjacent, uninvolved neurological structures to be spared. Modifying the anatomical exposure by varying the size and shape of the osseous craniectomy and placing the dural incision closer to the porus acousticus permits extradural retraction of the cerebellum. Thus large cerebellopontine angle neoplasms can be excised with less chance of damage to the cerebellum and smaller risk of hydrocephalus. The suboccipital craniectomy may be extended anteriorly to the facial nerve, thereby combining the suboccipital with the translabyrinthine approach, and providing a more direct angle to a large neoplasm involving the brain stem and cerebellum.
Cerebellar Neoplasms↗
A primary choroid plexus papilloma of the cerebellopontine angle.
Papillomas of the choroid plexus arising in and occupying the cerebellopontine angle are rare. Such a case occurring in a 41-year-old woman is reported. The signs and symptoms are described. The literature is reviewed.
Adult↗
Peduncular hemiplegia following removal of large cerebellopontine angle tumors: discussion of a mechanism of brain stem injury.
Large cerebellopontine angle tumors distort and displace the brain stem. Two cases are reported in which ipsilateral hemiparesis ensued postoperatively. Compression of the contralateral cerebral peduncle against the free edge of the tentorium cerebelli appears to be the mechanism leading to this mesencephalic dysfunction. Review of the literature failed to reveal a discussion of this mechanism of brain stem injury. Extension of tumor through the tentorial hiatus appears to make the mesencephalon particularly vulnerable. Incision of the tentorium prior to removal of a tumor when it invades the incisural hiatus may have merit.
Aged↗
Auditory brain stem responses in the diagnosis of cerebellopontine angle tumours.
There is a constant search for more reliable methods of diagnosing cerebellopontine angle tumours at an early stage. The auditory brain stem responses promise to be of use as such a method. In two patients with extracanalicular neurinomas we found a definitely abnormal brain stem response even though conventional tests produced a cochlear type of test pattern. In a third patient with a meningeoma we obtained a similar type of response. Here the conventional tests clearly pointed to the presence of retrocochlear disease. Characteristic findings are a broadening of the whole nerve action potential and a delay in the appearance of the Jewettv-FFP7 complex.
Adult↗
Lipoma of the cerebellopontine angle. Case report.
The authors present a surgical case of a lipoma of the cerebellopontine angle in a 28-year-old woman.
Adult↗