1/39. facial nerve schwannoma in the cerebellopontine cistern. Findings on high resolution CT and MR cisternography.We report a case of facial nerve schwannoma originating in the cerebellopontine cistern, diagnosed by cochlear sensorineural hearing loss, and involvement in the facial nerve canal and the anterior epitympanic recess. Precise analyses of neuro-otological and neuroradiological studies are crucial to obtain an accurate preoperative diagnosis.- - - - - - - - - - ranking = 1keywords = canal (Clic here for more details about this article) |
2/39. Facial neuroma in the internal auditory canal.Authors presented two cases of facial neuromas in the internal auditory canal, one without facial palsy and the other with facial palsy. In both cases neuromas were occult and undiagnosed. Although in the first case neuroma was greater than the other, facial palsy was not developed. The mechanism of the facial palsy due to neuromas could not be clearly clarified.- - - - - - - - - - ranking = 5keywords = canal (Clic here for more details about this article) |
3/39. Intracanalicular schwannoma of the facial nerve: a manifestation of neurofibromatosis type 2.Primary facial nerve tumors, which are relatively uncommon, can present a diagnostic dilemma based on their location and variable pattern of symptoms. Of primary cranial nerve tumors, schwannomas of the facial nerve rank third in frequency after those of the eighth and fifth cranial nerves. We report an illustrative case of an intracanalicular schwannoma associated with several central nervous system tumors, consistent with neurofibromatosis type 2. Initially assumed to be an eighth cranial nerve tumor, the schwannoma was found intraoperatively to arise from the facial nerve. early diagnosis and treatment enabled excision of the tumor without sacrifice of the facial nerve. facial nerve schwannomas can resemble acoustic schwannomas in their clinical presentation. Only a heightened level of clinical vigilance will point to the correct diagnosis and result in an optimal therapeutic outcome for patients with these rare tumors.- - - - - - - - - - ranking = 5keywords = canal (Clic here for more details about this article) |
4/39. Primary meningioma of the fallopian canal.Meningiomas are slow-growing lesions that represent approximately 20% of all intracranial tumors and are the second most common tumor of the cerebellopontine angle. In contrast, primary extracranial meningiomas are found relatively infrequently, and most cases have inadequate radiologic studies to determine if they were actually an extension from a primary intracranial source. Meningiomas of the intratemporal segment of the facial nerve have also been reported, but they are exceedingly rare and their pathophysiology remains unclear. We report a case of a meningioma of the facial nerve in the fallopian canal of a 7-year-old girl and review pertinent literature.- - - - - - - - - - ranking = 5keywords = canal (Clic here for more details about this article) |
5/39. Fibrous connective tissue lesion mimicking a vestibular schwannoma: case report.OBJECTIVE AND IMPORTANCE: cerebellopontine angle fibromas are rare pathological entities that can mimic the presentation of vestibular schwannomas (VSs). Diagnosis of these benign lesions, however, is important, because treatment options may be different. The clinical, radiological, and intraoperative features of these unusual lesions of the cerebellopontine angle are discussed, with review of the relevant literature. CLINICAL PRESENTATION: A 41-year-old man presented with recurrent episodes of diminished hearing on the left side, accompanied by facial ticks and pain on the same side. magnetic resonance imaging and computed tomographic scans revealed a 1.5-cm, primarily intracanalicular lesion, suggesting a left VS. INTERVENTION: The lesion was partially removed through a retrosigmoid suboccipital craniotomy. Its intraoperative appearance and hard fibrotic consistency differed from the classic features of VSs. The pathological findings indicated nontumoral fibrous connective tissue. The lesion exhibited no features of inflammation or fat and was also negative for S-100 staining. Follow-up magnetic resonance imaging scans demonstrated a small residual lesion, which exhibited shrinkage in subsequent magnetic resonance imaging studies. The painful ticks disappeared and facial nerve weakness improved postoperatively. CONCLUSION: Although cerebellopontine angle fibromas may present similar radiological features, their clinical presentation may be somewhat different from that of typical VSs. If a fibroma is suspected, radiosurgery should be avoided; limited surgery may be considered as an option for patients experiencing symptoms. Because fibromas may be intraoperatively noted to be fibrotic and vascular, radical removal may not be easy or justified. After the final diagnosis has been reached, conservative treatment of the residual lesion may be the best option.- - - - - - - - - - ranking = 1keywords = canal (Clic here for more details about this article) |
6/39. Immediate neurological deterioration after gamma knife radiosurgery for acoustic neuroma. Case report.The authors describe acute deterioration in facial and acoustic neuropathies following radiosurgery for acoustic neuromas. In May 1995, a 26-year-old man, who had no evidence of neurofibromatosis Type 2, was treated with gamma knife radiosurgery (GKS; maximum dose 20 Gy and margin dose 14 Gy) for a right-sided intracanalicular acoustic tumor. Two days after the treatment, he developed headache, vomiting, right-sided facial weakness, tinnitus, and right hearing loss. There was a deterioration of facial nerve function and hearing function from pretreatment values. The facial function worsened from House-Brackmann Grade 1 to 3. Hearing deteriorated from Grade 1 to 5. Magnetic resonance (MR) images, obtained at the same time revealed an obvious decrease in contrast enhancement of the tumor without any change in tumor size or peritumoral edema. facial nerve function improved gradually and increased to House-Brackmann Grade 2 by 8 months post-GKS. The tumor has been unchanged in size for 5 years, and facial nerve function has also been maintained at Grade 2 with unchanged deafness. This is the first detailed report of immediate facial neuropathy after GKS for acoustic neuroma and MR imaging revealing early possibly toxic changes. Potential explanations for this phenomenon are presented.- - - - - - - - - - ranking = 1keywords = canal (Clic here for more details about this article) |
7/39. A cavernous hemangioma simulating an intracanalicular acoustic neurinoma--a case report.A case of an intrameatal cavernous hemangioma is reported. The 53-year-old patient presented with decreased hearing and a slight 7th nerve palsy on the left. Clinical features and preoperative radiological appearances were indistinguishable from those of an acoustic neurinoma. Though, DD the involvement of all three nerves (N. facialis, N. cochlearis, N. vestibularis) should have lead to another entity. The tumour showed intraoperatively no relationship to the 8th cranial nerve, but was very adherent to the facial nerve. The macroscopic appearance differed to the usual aspect of an acoustic neurinoma. The final diagnosis was made after the operation with histopathological methods. The clinical features and pathology of this type of tumour are discussed.- - - - - - - - - - ranking = 4keywords = canal (Clic here for more details about this article) |
8/39. hemangioma of the facial nerve.To discuss the interest of the etiologic diagnosis of a facial palsy. STUDY DESIGN AND patients: Two cases of geniculate ganglion hemangioma with progressive facial palsy are reported. RESULTS: hemangioma of the facial nerve is a rare and benign vascular tumor that originates from the venous plexus surrounding the facial nerve. The most common locations are the internal auditory canal and the geniculate ganglion. Diagnosis of these small tumors is radiological with CT-scan and MRI studies. Surgical excision through a supra-petrosal approach is the gold standard treatment. Hemangiomas of the facial nerve and particularly those developed in the geniculate ganglion area constitute a rare but not inconsiderable facial palsy etiology. An acute diagnosis and an early excision are fundamental to preserve a satisfactory facial function.- - - - - - - - - - ranking = 1keywords = canal (Clic here for more details about this article) |
9/39. temporal bone pathology in Wegener's granulomatosis.This study aimed to demonstrate the temporal bone histopathology of two cases of Wegener's granulomatosis in which the initial symptoms were profound hearing loss and facial nerve palsy respectively. The first case, a woman of 44, suffered profound hearing loss which was remarkably improved by steroid and cyclophosphamide treatment for a time, and which seemed to be caused by invasion from granulation tissue filled in the tympanic cavity. The second case was a 61-year-old woman presenting with the facial nerve palsy. The bony canal of the horizontal portion of the facial nerve was destroyed due to granulation tissue which filled in the tympanic cavity, and granulomatous involvement was observed in the facial nerve. Wegener's granulomatosis can involve the middle ear and/or inner ear, causing hearing loss of conductive, mixed or sensorineural type. Pathogenesis of facial nerve palsy seems to be related to Wegener's granulomatous involvement of facial nerve, because the facial nerve palsy also resolved by using steroid and cyclophosphamide.- - - - - - - - - - ranking = 1keywords = canal (Clic here for more details about this article) |
10/39. A primary glomus tumour of the facial nerve canal.Glomus tumours can present in several sites in the head and neck. A red mass in the middle ear, visible on otoscopy generally indicates a glomus tympanicum or glomus jugulare. We present photographic and radiologic evidence of such a lesion arising from the course of the intra-tympanic facial nerve, the Fallopian canal, and review the differential diagnoses.- - - - - - - - - - ranking = 5keywords = canal (Clic here for more details about this article) |
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