Cases reported "Neurilemmoma"

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1/241. Plexiform schwannoma of the neck extending deeply to the mediastinum.

    We describe a 42-year-old man who had tumors occupying the right deep neck through the upper part of the mediastinum. The right vocal cord was fixed and bulgings of the pharyngeal and tracheal wall were observed. At surgery, the masses were subtotally removed as much as possible. Histological examination revealed that they were schwannomas. The postoperative course was uneventful, except for the presence of hoarseness.
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ranking = 1
keywords = upper
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2/241. Spinal subarachnoid hemorrhage attributable to schwannoma of the cauda equina.

    BACKGROUND: cauda equina syndrome occurring as a result of spontaneous spinal subarachnoid hemorrhage (SAH) from a spinal tumor is reported to be rare. CASE DESCRIPTION: A 28-year-old woman presented at our clinic with a history of severe back pain for 10 days, progressive paraparesis, and urinary retention. Her physical examination revealed a mass located intradurally at the level of L1-2 and a massive SAH. An L1-L2, laminectomy and a hemilaminectomy from D9 to D12 were performed and the SAH was evacuated and the cord was decompressed. CONCLUSION: At the first year follow-up, her restricted dorsal and plantar flexion continued. Post-gadolinium magnetic resonance imaging revealed no mass.
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ranking = 11.088492980486
keywords = back pain, back
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3/241. Solitary olfactory groove schwannoma: case report with review of the literature.

    A 45-year-old man presented with headaches of 6 months' duration and generalized seizures in a cluster 2 days prior to admission. Examination revealed bilateral papilloedema and no focal deficits. CT scan showed an isodense enhancing mass lesion in the right frontobasal region with perilesional edema. Bifrontal craniotomy (with total excision of the tumor) revealed a tumor in the region of the right olfactory groove attached to the cribriform plate. Histopathological examination disclosed it to be a hyalinised schwannoma. Solitary schwannomas arising from the olfactory groove are extremely rare. Only six other cases have been reported so far. The presentation. CT scan findings and histogenesis of the tumor are discussed along with a review of the literature.
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ranking = 2.1589881161057
keywords = headache
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4/241. Cutaneous-evoked tinnitus. I. Phenomenology, psychophysics and functional imaging.

    DC00166e and acute unilateral deafferentation of the auditory periphery (auditory and vestibular afferents) can induce changes in the central nervous system that may result in unique forms of tinnitus. These tinnitus perceptions can be controlled (turned on and off) or modulated (changed in pitch or loudness) by performing certain overt behaviors in other sensory/motor systems. Clinical reports from our laboratory and several other independent sources indicate that static change in eye gaze, from a neutral head-referenced position, is one such behavior that can evoke, modulate and/or suppress these phantom auditory events. This report deals with a new clinical entity and a form of tinnitus that can be evoked directly by cutaneous stimulation of the upper hand and fingertip regions. In 2 adults, cutaneous-evoked tinnitus was reported following neurosurgery for space-occupying lesions at the base of the skull and posterior craniofossa, where hearing and vestibular functions were lost completely and acutely in one ear (unilateral deafferentation) and facial nerve paralysis (unilateral deefferentation) was present either immediately following neurosurgery or had occurred as a delayed-onset event. Herein, we focus on the phenomenology of this discovery, provide perceptual correlates using contemporary psychophysical methods and document in one individual cutaneous-evoked tinnitus-related neural activity using functional magnetic resonance imaging. In a companion paper, neuroanatomical and physiological interactions between auditory and somatosensory systems, possible mechanistic accounts and relevant functional neuroimaging studies are reviewed.
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5/241. Schwannoma of the oculomotor nerve: a case report with consideration of the surgical treatment.

    OBJECTIVE AND IMPORTANCE: Oculomotor schwannoma is extremely rare. We report a case of oculomotor schwannoma with consideration of its surgical management. CLINICAL PRESENTATION: A 64-year-old woman with a history of chronic headache underwent a computed tomographic scan, which revealed a mass lesion in the right prepontine cistern. She had no neurological deficits at admission. INTERVENTION: The tumor originated from the right oculomotor nerve. It was subtotally removed, leaving a tiny part attached to the nerve. The nerve trunk was preserved. A pathological examination revealed a schwannoma. Transient right oculomotor nerve palsy occurred postoperatively, but it improved almost completely. CONCLUSION: The tumor in the present case was resected, preserving serviceable oculomotor function. However, among 16 patients reported in the literature, all but one developed or maintained severe postsurgical oculomotor nerve palsy. We conclude that surgical resection generally is not indicated for oculomotor schwannomas, excluding large tumors that cause intractable symptoms.
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ranking = 2.1589881161057
keywords = headache
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6/241. Pancreatic Schwannoma: report of a case.

    We present herein a case of solitary schwannoma of the pancreas and also review 26 previously reported cases from the English and Japanese literature. Primary schwannoma of the pancreas is a rare tumor. A 50-year-old female was discovered to have a large mass in the upper abdomen on ultrasonography. An examination by computed tomography (CT) scan, magnetic resonance imaging (MRI), and ultrasonography revealed a solid and cystic tumor in the left upper quadrant of the abdomen. A distal pancreatectomy with a splenectomy was performed to remove this tumor. A microscopic examination identified the tumor to be situated in the pancreas while it was composed of cells that originated from schwann cells. Only 26 cases of pancreatic schwannoma have previously been reported in the English and Japanese literature. We describe in detail the characteristic findings based on image analyses, including CT scan, MRI, ultrasonography, and angiography, in these 26 cases.
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ranking = 2
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7/241. oculomotor nerve schwannoma associated with ophthalmoplegic migraine.

    PURPOSE: To describe a patient with an oculomotor nerve schwannoma who had symptoms of ophthalmoplegic migraine. methods: Case report. RESULTS: A 23-year-old woman had a history of recurrent headache accompanied by transient right oculomotor palsy since age 7 years. ophthalmoplegic migraine was diagnosed. She was subsequently found to have a structural lesion of her right oculomotor nerve on magnetic resonance imaging. The magnetic resonance image characteristics were consistent with schwannoma originating from the oculomotor nerve. CONCLUSIONS: This case illustrates that an intrinsic lesion of the oculomotor nerve (schwannoma) may be associated with a painful relapsing-remitting oculomotor palsy mimicking the clinical syndrome of ophthalmoplegic migraine.
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ranking = 2.1589881161057
keywords = headache
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8/241. Tracheal neurilemmoma mimicking bronchial asthma--a dilemma of difficult diagnosis: case report.

    Tracheal tumors are often overlooked as a cause of pulmonary symptoms until they reach an advanced state. They are often presented with a prolonged cough and shortness of breath. Most tracheal tumors in adults are cancerous (80% to 90%). Benign tracheal tumors are rare in adult patients. A case history is presented of a 19-year-old patient with a rare tracheal neurilemmoma. He was treated as having bronchial asthma initially, but his signs and symptoms did not improve with traditional therapy. The possibility of the presence of an upper airway obstruction was not raised until the typical "inspiratory tubular sound" was heard. Flow-volume loop testing, bronchoscopy, and three-dimensional computed tomography (3-D CT) confirmed the diagnosis of upper airway obstruction caused by a tracheal tumor. Therefore, surgical intervention rather than bronchoscopic removal was performed without difficulty. The patient was leading a stable life 8 months after a surgical resection. The presence of an upper airway obstruction can be proven by flow-volume loop testing and 3-D CT. Further pathologic confirmation can be accomplished by bronchoscopy. High suspicion of an upper airway obstruction such as a tracheal lesion should be raised when bronchial asthma patients fail to respond to conventional treatment.
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ranking = 4
keywords = upper
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9/241. En bloc resection of an intracavernous oculomotor nerve schwannoma and grafting of the oculomotor nerve with sural nerve. Case report and review of the literature.

    A case in which a left oculomotor nerve schwannoma treated by en bloc resection of the lesion and grafting of the oculomotor nerve with sural nerve is presented. Recovery of nerve function was partial, but useful and cosmetically good. The last follow-up examination performed 2 years after surgery revealed recovery of function in the elevator muscle of the upper eyelid, together with slight vertical movement of the eye.
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ranking = 1
keywords = upper
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10/241. Neurologic disease presenting as chronic pelvic pain.

    Neurologic disease as a cause of chronic pelvic pain may be more common than previously reported. We report three cases wherein patients with complaints of pelvic pain were subsequently found to have neurologic disease involving the lumbosacral spine. In all three cases, the presenting features were complaints of cyclic or noncyclic lower abdominal pain attributed to endometriosis, pelvic inflammatory disease, or uterine fibroids. When conventional therapies failed to resolve the pain, magnetic resonance imaging (MRI) of the lumbosacral spine showed a neoplasm in one patient and disk herniation in two patients. Evolving lumbar disk disease or intradural neoplasms in the upper lumbar area can produce symptoms interpreted as pelvic pain. Symptoms consistent with radiculopathy occurred late in the course of each of the three cases reported.
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ranking = 2.1523324258354
keywords = abdominal pain, upper
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