• Journal of Korean Neurosurgical Society
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• v.30 no.9
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• pp.1144-1149
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• 2001

Schwannomas of the jugular foramen, originating from the glossopharyngeal nerve, vagus and accessory nerve represent approximately 0.17-0.72% of all intracranial tumor, and consists of 1.4-2.9% of all intracranial schwannomas. The clinical presentation of these tumors varies significantly according to originated nerve and it's growth pattern. Magnetic resonance(MR) image and temporal bone computed tomography(CT) scan have a major role for diagnosis of such tumor. The treatment of choice is total resection whenever possible. Generally, suboccipital approach is sufficient for the removal of the tumor, but in case with large size, combination of resection of petrous part of temporal bone with or without transection of sigmoid sinus is may be necessory. We have recently experienced one case of giant jugular foramen schwannoma and postoperative fatal complication in a 34-year-old male who was treated with combined posterior petrous and suboccipital approach with transection of sigmoid sinus

• Journal of Korean Neurosurgical Society
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• v.30 no.9
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• pp.1127-1129
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• 2001

The vast majority of schwannomas occur on cranial nerves, and rarely in the retroperitoneum. Solitary schwannoma in the psoas muscle is extremely rare. The authors present a case of retroperitoneal neoplasm in the psoas muscle identified as schwannoma which is not associated with von Recklinghausen's disease. A 68 years old female patient was admitted because of low back pain and weakness at the left leg. CT and MRI revealed a large cystic mass with well-defined margin and multiple internal septation within the left psoas muscle. The tumor was totally extirpated and histologically confirmed as a schwannoma.

• Archives of Plastic Surgery
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• v.36 no.6
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• pp.799-802
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• 2009

Purpose: Schwannoma is one of common neoplasm in the central and peripheral nervous systems. However, schwannoma of sciatic nerve is rare, especially large schwannoma arising in sciatic nerve is extremely rare. This is a report of our experience with large schwannoma arising in sciatic nerve with minimal neurologic symptoms. Methods: A 65 - year - old man presented with palpable mass in middle portion of posterior thigh. No definitive neurologic deficits were detected on physical examinations. CT and sonography showed well - defined mass with large dimension. The mass was excised and confirmed histologically as a schwannoma. In postoperative period, NCS and EMG were followed. Results: The patient complained of difficulty in dorsiflexion of ipsilateral ankle joint postoperatively. NCS and EMG obtained immediately and showed sciatic neuropathy. After 2 months postoperatively, NCS and EMG were followed and abnormal findings of previous NCS and EMG were not found. Dorsiflexion of ankle joint was improved to normal range of motion. Conclusion: We report a rare case of large schwannoma arising in sciatic nerve with no definitive neurologic symptoms.

• Tuberculosis and Respiratory Diseases
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• v.44 no.3
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• pp.649-654
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• 1997

Benign solitary schwannoma of the chest wall is a rare disease of nerve sheath origin A 43-year-old female patient was admitted to our hospital for right upper quandrant pain Chest X-ray shows nonspecific finding, ultrasonography & CT scan revealed a solid tumor on the right lateral chest wall. On aspiration needle biopsy, this mass was turned out to be a schwannoma of the right lateral chest wall. This mass was excised surgically in an encapsulated state by right lateral thoracotomy. Histological section revealed a typical schwannoma, which is characterized by Antoni A and Antoni B tissues of high & low cellularity.

• Journal of Korean Neurosurgical Society
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• v.30 no.sup1
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• pp.149-152
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• 2001

The authors report a case of an extremely rare extraosseous chordoma in the upper cervical spine of a 70-year-old woman, which occupied the intradural and extradural portions, simultaneously. She underwent the operation with C2,3 total laminectomy and grossly total removal and postoperative radiation therapy. Extraosseous chordoma was very rare in the literatures. In addition, it was the first reported case of the extraosseous chordoma occupeid the intradural and extradural portions, simultaneously. And extraosseous chordoma must be distinguished from ecchordosis physaliphora, which is benign nature, usually asymptomatic.

• Journal of Korean Neurosurgical Society
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• v.30 no.sup2
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• pp.328-331
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• 2001

Trigeminal schwannoma is an uncommon intracranial tumor and constitutes less than 0.08-8% of all intracranial schwannoma. Trigeminal shchwannoma is even rarer in childhood and only 11 cases of trigeminal schwannoma under the age of 14 have been reported including our case. We experienced a case of trigeminal schwannoma in a 9 year-old girl without the stigmata of neurofibromatosis. She presented with a 2 week-history of right abducens nerve palsy. Magnetic resonance image demonstrated a dumbbell-shaped tumor extending into right middle and posterior fossas with a size of $60{\times}45{\times}35mm$. The tumor was successfully removed by right transzygomatic subtemporal extradural approach. Pathologic examination of the mass revealed typical features of schwannoma.

• Journal of Korean Neurosurgical Society
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• v.29 no.4
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• pp.550-554
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• 2000

Most extracranial schwannomas are solitary, but neurofibromas are frequently associated with other manietations of neurofibromatosis. Schwannomas that occur within the context of neurofibromatosis tend to be multiple, but multiple schwannomas without manifestation of neurofibromatosis type 2 are very rare. The authors report a very rare case of multiple spinal intradural schwannomas in the absence of neurofibromatosis Type 2 maniestations. A 40-year-old man suffered from longstanding low back pain and left side sciatica which was treated with two stage operations. MRI showed multiple intradural mass lesions extending from L1 vertebral segment to S1 vertebral segment. There were no clinical and radiological manifestations of Type 2 neurofibromatosis. Histologically confirmed diagnosis was schwannoma.

• Korean Journal of Head & Neck Oncology
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• v.24 no.2
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• pp.174-178
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• 2008

Background and Objectives：Peripheral nerve sheath tumors(PNSTs) are uncommon neoplasm in the head and neck region. The treatment of PNSTs is surgical removal, but excision cause neurologic complications. This study was performed to evaluate the proper diagnosis and treatment of PNSTs with our experiences. Subjects and Method：During the period from October 1994 to July 2007, 58 patients were diagonised with PNSTs in head and neck region. We reviewed medical records and imaging study retrospectively. Result：95%(55/58) of the PNSTs in head and neck were benign；5%(3/58) were malignant peripheralnerve sheath tumors(MPNSTs). 63%(37/58) were neurilemoma, 20%(17/20) were neurofibroma, 2%(1/58) was perineuroma. 55 patients underwent surgery. 80%(45/55) of cases were treated with excision. Enucleation was performed in 7(14%) patients. All cases of benign neurogenic tumors showed no recurrence. Among 3 of MPNSTs 2 patients were Von Recklinghausen’s disease and expired with regional recurrence and lung metastasis. Conclusion：The benign PNSTs can be treated with enucleation if possible and observation can be another choice to minimize neurologic sequele.

• Archives of Reconstructive Microsurgery
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• v.21 no.2
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• pp.165-169
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• 2012

Intramuscular schwannomma is unusual and rare cases were reported in the literature in the gluteus maximus muscle. We present a case of an intramuscular schwannoma arising from the gluteus maximus muscle in a sixty-five-year-old woman. An oval in shape and well encapsulated tumor was found embedded with the gluteus maximus muscle, and then the lesion was excised surgically. Two years following excision of the lesion, the patient remained asymptomatic, with no evidence of local recurrence.

• Archives of Reconstructive Microsurgery
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• v.21 no.2
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• pp.92-96
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• 2012

As a rare cause of tumor in hand, we report eight cases of neurilemmoma in the digital nerve. Enucleation of the neurilemmoma under the microscopy resulted in complete relief of the symptoms at the latest follow-up.