Cases reported "Neuroma"

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1/7. Palisaded encapsulated neuroma--a classic presentation of a commonly misdiagnosed neural tumor.

    We present a case report of a classical presentation of palisaded encapsulated neuroma (PEN) of the skin occurring on the nasolabial crease and a review of the literature. A young woman presented with a smooth lobulated papule on the cheek enlarging over 2 years. Histologic examination revealed a well-circumscribed dermal nodule of small spindle cells with wavy nuclei arranged in fascicles, consistent with the diagnosis of PEN. PEN is a previously described, benign cutaneous neural tumour, with a histological appearance between that of a neurofibroma and a schwannoma. Though not uncommon, PEN remains under-diagnosed by many pathologists. Clinically, PEN is most commonly misdiagnosed as a basal cell carcinoma, a nevus, or as a neurofibroma.
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keywords = schwann
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2/7. foot schwannomas that mimic nerve-entrapment syndromes: a report of three cases.

    Schwannomas of the foot are rare. We describe three cases that mimicked compressive neuropathy, two resembling tarsal tunnel syndrome and a third resembling Morton's neuroma. All three patients had complete resolution of their pain after resection of the tumor.
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keywords = schwann
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3/7. Computed tomographic analysis of the intratemporal facial nerve and facial nerve neuromas.

    High-resolution computed tomography (HRCT) has replaced multidirectional tomography in the detailed analysis of the temporal bone because of its excellent resolution of fine bony detail. Small soft-tissue masses not discernible on plain tomograms are easily seen using HRCT. Unsuspected early disease which has not caused recognizable bone erosion in also demonstrable by HRCT. Last but not least, the amount of radiation received by a patient as a result of HRCT is considerably less. We illustrate the normal course of the facial nerve through the temporal bone, its anatomical relationship to various adjacent structures, and the numerous branches given off during its course through the temporal bone. The clinical features of facial nerve neuromas (schwannomas) depend on their location and include facial nerve weakness or paralysis, otalgia or facial pain, hearing loss or imbalance, and loss of taste sensation. HRCT allows the identification of a soft-tissue mass along the course of the facial nerve, with its bony canal usually enlarged by the mass. pressure erosion of the underlying bone is often noted and erosion of the ossicles may be demonstrated in the case of middle ear involvement. The importance of both clinical and radiological correlation cannot be overemphasized in the discovery of these tumors.
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keywords = schwann
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4/7. Benign neurogenic tumors of the oral cavity.

    Neurogenic tumors are rare in the oral cavity, particularly so when malignant. Traumatic neuroma, although usually included with neurogenic tumors, is a reactive process rather than a true neoplasm. neurofibroma and schwannoma derive from nerve fibers, the perineurium, the endoneurium and the neurolemmomal cells. They present histological differences. The neurofibroma may present in solitary and generalized types; the latter also known as neurofibromatosis or von Recklinghausen's disease of the skin. We here report typical cases of benign neurogenic tumors of the oral cavity.
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keywords = schwann
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5/7. MR findings of an unusual intracranial neuroma simulating a meningioma.

    We report an unusual intracranial neuroma that simulated a meningioma on CT and magnetic resonance imaging. A diagnosis of meningioma was suggested because the tumor was tentorium-based; had enlarged into both the middle and posterior fossae; contained calcification and was homogeneous and densely enhancing on contrast CT; and was isointense with brain on T1- and T2-weighted images. The tumor proved to be a schwannoma with characteristic electron microscopic findings.
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keywords = schwann
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6/7. Intratemporal facial nerve perineurioma.

    Forty-two cases of perineurioma have been reported in the literature. This report adds the first intratemporal facial nerve perineurioma to the literature and reviews the others. Unlike schwannoma and neurofibroma, the histological features of perineurioma demonstrate onion bulb-like structures with a strong positive immunoreactivity for epithelial membrane antigen. The clinical history of gradual facial nerve paresis was 15 years in the case presentation and the clinical diagnosis of tumor was overlooked.
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ranking = 1
keywords = schwann
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7/7. Cervical neuroma presenting as a subarachnoid hemorrhage: case report.

    OBJECTIVE AND IMPORTANCE: The association of subarachnoid hemorrhage (SAH) with spinal lesions is well known, but hemorrhage from a cervical schwannoma is exceedingly rare. The histopathology and the mechanism of bleeding are discussed. CLINICAL PRESENTATION: We report a healthy 37-year-old man presenting with SAH after intense physical stress caused by bleeding of a cervical neuroma. INTERVENTION: A C6-T1 laminectomy disclosed an ovoid lesion, 4 cm in diameter; extremely dilated veins originated from the tumor. Removal of the spinal lesion resulted in immediate decongestion of the related venous network. The histopathological examination confirmed that the lesion was a telangiectatic schwannoma. The mechanism of bleeding of the intraforaminal cervical schwannoma is discussed. CONCLUSION: Telangiectatic neuromas may be a cause of occult SAH. The importance of magnetic resonance imaging of the cervical spine is emphasized to explain SAH with negative findings on four-vessel angiography in patients whose SAH may have a surgically correctable cause distant from the intracranial compartment.
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ranking = 3
keywords = schwann
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