• Korean Journal of Head & Neck Oncology
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• v.8 no.1
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• pp.44-49
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• 1992

Malignant schwannoma is a rare tumor arising from the schwann sheath of the nerve fibers. It spreads early to reginal node and metastasis to the lung. Radical surgery have performed for treatment of choice but combined modalities such as radiotherapy or adjuvant chemotherapy have been recommanded recently. The authors experienced two cases of malignant schwannoma originating from the ethmoid sinus and ventricular fold of larynx. and we report these cases briefly.

• Korean Journal of Head & Neck Oncology
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• v.12 no.2
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• pp.230-234
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• 1996

Benign nonepithelial tumors of the thyroid gland are very rare and include lesions such as vascular tumors, smooth muscle tumors and neurogenic tumors. Schwannoma and neurofibroma are benign neoplasms of mesenchymal origin which frequently occur in the head and neck, but their origin within the thyroid gland has rarely been reported. Recently, we encountered two cases of neurogenic tumor of thyroid gland(l schwannoma, 1 neurofibroma) and report them to support the view that Schwannoma and neurofibroma may occur in thyroid gland, which is an unusual site, and are recognizable entities.

• Journal of Korean Neurosurgical Society
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• v.39 no.2
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• pp.156-158
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• 2006

We present a case of olfactory schwannoma in a 16-year-old boy with headache and diplopia. Brain computed tomography[CT] scan and magnetic resonance[MR] imaging showed a huge mass in the subfrontal area resembling an olfactory groove meningioma. We performed a bifrontal craniotomy and found out the mass was attached to cribriform plate but was not related to the olfactory tract or bulb. The histopathological diagnosis of schwannoma was confirmed by immunohistochemical staining for S-100, vimentin and others. We describe the clinical manifestations, radiological characteristics, histological aspects, and differential diagnosis of this tumor with literature review.

• Journal of Korean Neurosurgical Society
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• v.54 no.4
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• pp.340-343
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• 2013

Intracerebral schwannomas are rare and there have been none reported in Korea. We present the case of a 25-year-old man with newly developed right-side weakness and recent seizure aggravation. His seizures started approximately 9 years prior to admission. At that time, a 1 cm diameter intra-axial enhancing mass at the left precentral gyrus was found on magnetic resonance image (MRI). After 9 years of observation and treatment with antiepileptic medication, an MRI taken due to symptom aggravation revealed peri-tumoral cyst formation with tumor enlargement. The tumor was surgically removed. Subsequently, right-side weakness diminished and there was good seizure control. Pathologic diagnosis was schwannoma. Schwannoma is a very rare tumor and there are no pathognomonic findings on radiologic images; thus, it is challenging to make a correct diagnosis. However, considering the natural course and excellent prognosis after surgical treatment of this kind of intra-axial mass with benign features, early surgery for diagnosis and proper treatment is highly recommended.

• Korean Journal of Head & Neck Oncology
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• v.34 no.1
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• pp.59-63
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• 2018

Brachial plexus schwannomas are rare tumors. They are benign nerve sheath tumors and only about 5% of Schwannoma arise from the brachial plexus. Due to its rarity and complex anatomical location they can pose a formidable challenge to surgeons. We present a case of a young patient who presented with an supraclavicular swelling three months, that were proven to be schwannoma on histopathology.

• Journal of the Korean Society of Laryngology, Phoniatrics and Logopedics
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• v.26 no.2
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• pp.130-132
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• 2015

Schwannoma of the larynx is uncommon neurogenic tumor that can cause the air way obstruction. For benign lesions, conservative surgical excision is the treatment of choice. Recently, we experienced a case of schwannoma originating from the subglottis in a 52 year old female patient. The tumor was removed successfully through endoscopic approach.

• Journal of Korean Neurosurgical Society
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• v.47 no.1
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• pp.64-67
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• 2010

Although very rare, a few cases of intradural extramedullary (IDEM) spinal tumor migration have been reported since Tomimatsu first reported a mobile schwannoma of the cervical cord in 1974. Schwan noma is a neurogenic tumor which originates from nerve sheath that it is relatively well-marginated tumor with little attachment or adhesion to surrounding tissue. Mobility of tumor in spinal canal sometimes can result in negative exploration at the expected area. We found three interesting cases in which different tumor locations observed in repeated magnetic resonance image (MRI) findings. All tumors were intradural and extramedullary schwannoma. We reviewed the literature about moving tumor in the spine through PUBMED search.

• Journal of Korean Neurosurgical Society
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• v.47 no.2
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• pp.137-139
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• 2010

A subarachnoid hemorrhage (SAH) associated with negative finding on four-vessel angiography is seen in 5 to 30% of patients with intracranial SAH. A previously silent lesion in the spinal canal may be responsible for the angiographically negative finding for cause of intracranial SAH. We report a case of upper cervical (C1-2) intradural schwannoma presenting with acute intracranial SAH. Repeated cerebral angiographic studies were negative, but cervical magnetic resonance imaging study and tissue pathology revealed a intradural-extramedullary schwannoma in C1-2 level. This case illustrates the importance of a high index of clinical suspicion for spinal disease in angiographically negative intracranial SAH patients.

• Investigative Magnetic Resonance Imaging
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• v.23 no.4
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• pp.385-389
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• 2019

Schwannoma or neurilemmoma is a benign peripheral nerve sheath tumor that arises from Schwann cells. Approximately 25-45% of all schwannomas occur in the head and neck regions, and the intraoral presentation of these is only 1%. We report a rare case of a patient presenting tongue base schwannoma with characteristic imaging features on computed tomography and magnetic resonance imaging.

• Journal of Chest Surgery
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• v.49 no.1
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• pp.63-66
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• 2016

Neurogenic tumors are the most prevalent tumors of the mediastinum, and schwannomas are the most common type of neurogenic tumor. Primary neurogenic neoplasm of the esophagus is uncommon and malignant schwannoma of the esophagus is extremely rare. We report a case of a 27-year-old female presenting with dysphagia and palpitations who was found to have a lobulated tumor in the mediastinum that was compressing the esophageal lumen. The tumor was successfully treated surgically without recurrence. The final diagnosis, on histopathological examination of the specimen, was malignant schwannoma.