• 대한골관절종양학회지
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• 제19권1호
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• pp.37-41
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• 2013

고대 신경초종(ancient schwannoma)은 신경초종의 변이(variant)로서 천천히 자라나고 퇴행성 변화를 동반한 양성종양으로 알려져 있다. 또한 신경초종은 신전부에서는 상대적으로 드물게 발생하는 것으로 보고되어 왔다. 저자들은 50세 남자 환자의 상완 신전부 삼두근에서 발생한 고립성 고대 신경초종을 경험하였기에 이를 보고하고자 하였다.

• 대한골관절종양학회지
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• 제12권1호
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• pp.89-94
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• 2006

신경초종이 오래되어서 퇴행성 변화를 일으키면 이를 퇴행성 신경초종이라고 명칭하며, 드물게 보고되고 있다. 혈관주변의 초자화, 출혈, 석회화, 낭성 괴사, Antoni A 구역의 축소, 핵의 변형 등의 퇴행성 변화가 나타날 수 있으며, 이러한 퇴행성 변화로 인해 육종 등으로 잘못 진단되기 쉽다. 본원에서는 75세 남자 환자의 하퇴부에서 광범위한 출혈과 혈종, 낭성 변화, 석회화, Antoni A 구역의 축소 등의 퇴행성 변화가 진행된 퇴행성 신경초종을 경험하였기에 문헌적 고찰과 함께 이를 보고하는 바이다.

• Imaging Science in Dentistry
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• 제53권3호
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• pp.239-245
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• 2023

Schwannomas are uncommon neoplasms of neurologic origin that are rare in the salivary glands. A schwannoma that persists for a long time is referred to as an ancient schwannoma if it is accompanied by degenerative changes on histology. The case described herein involved a 37-year-old man with an ancient schwannoma that had persisted for 20 years in his right parotid gland. Clinically, the lesion presented with swelling and pain. Computed tomography revealed a well-defined, multilocular enhanced lesion. T2-weighted magnetic resonance images displayed multilocular hyperintensity, while T1-weighted images showed a high signal at the lobulated margin and a homogeneous low signal internally. The preoperative diagnosis, based on the lesion's location and imaging diagnosis, was Warthin's tumor. However, a biopsy conducted after surgical excision identified the lesion as a schwannoma with cystic degeneration. This report also presents a summary of the characteristics of rare cases of schwannoma in the major salivary gland based on this case and a literature review.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제35권6호
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• pp.402-407
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• 2013

Schwannomas originate from the Schwann cells in the neural sheath of the peripheral nerves. Ancient schwannoma is one of five variants, and its characteristics include histopathological degeneration and diffuse hypocellular areas. Histopathological features show degenerative changes and atypical nuclei can easily be confused with malignant neoplasms. These cellular atypisms are caused solely by degenerative changes. Ancient schwannomas have been reported 17 cases of in the oral cavity and five cases in the ventral tongue, including the floor of the mouth. We report a new case of an ancient schwannoma, misdiagnosed as a hemangioma with a 10-year evolution, located in the ventral tongue of a 29-year-old female.

• 대한세포병리학회지
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• 제1권2호
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• pp.158-163
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• 1990

Ancient (degenerated) schwannomas are benign tumors that display pronounced degenerative changes including cyst formation, calcification, hemorrhage, and hyalinization. The tumors are usually infiltrated by large numbers of inflammatory cells such as neutrophils, lymphocytes, siderophages, and histiocytes. They are located in deep locations such as the retroperitoneum and must be differentiated from malignant soft tissue tumors because spindle cells with nuclear atypia may be present. In the fine needle aspiration biopsy. The cytologic findings of two cases of ancient schwannoma occurring in posterior mediastinum and retroperitoneum, respectively, are described. Computerized tomographic findings of both cases showed changes of cystic degeneration or necrosis. A case occurred in retroperitoneum revealed features of destruction of vertebral body to suggest a malignant soft tussue tumor radiologically. The cytologic findings of aspiration biopsy of both tumors revealed that the tumor cells were spindle in shape with elongated nuclei. Some of tumor cells were arranged in a palisading fashion. Cell structures that resemble the Verocay bodies were observed. Some of the tumor cells showed pleomorphic bizarre nuclei, but no mitotic activity or chromatin clumping was seen. Inflammatory cells, siderophages and histiocytes were scattered in fibrillar material. These cytologic findings are important in the diagnosis of ancient schwannoma and in the differentiation of this tumor from the malignant spindle cell tumor.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제37권6호
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• pp.530-534
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• 2011

This paper reports two cases of schwannomas arising from the oral cavity. One is an intraoral ancient schwannoma located at the left cheek, which evolved over a period of 13 years. The tumor was a well-demarcated buccal mass, which was located in the left lower first premolar area, with an obliterated the buccal vestibule, leaving the overlying mucosa intact. The second case was a central intraosseous schwannoma located from the left lower 1st molar periapical area to the left 3rd molar periapical area. Pathologically, the first mass was composed of the spindle shaped tumor cells with wavy nuclei beneath the fibroconnective tissue of the gingiva but second case mass was not. Occasional nuclear pleomorphism was observed but mitosis or necrosis was absent. There were Antoni A and B areas along with strong, diffuse staining with the S-100 protein. Ancient schwannomas were diagnosed. Schwannoma is a slow-growing benign tumor, and an ancient schwannoma that shows cellular atypism is a variant of a schwannoma caused by purely degenerative changes. To date, only limited cases of ancient schwannomas in the oral cavity have been reported.

• Investigative Magnetic Resonance Imaging
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• 제15권2호
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• pp.170-175
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• 2011

고대신경초종(ancient schwannoma)은 신경초종의 변이(variant)로서 천천히 자라나고 퇴행성 변화를 동반한 드문 양성종양으로 알려져 있으며 자기공명영상상 큰 크기와 불균질한 신호강도 때문에 악성 종양으로 오인될 수 있다. 연부조직 종양이 얼기모양(plexiform)을 보일때, 총상신경섬유종, 또는 악성말초신경초종양 등을 감별해야 한다. 이에 저자들은 63세 여자 환자의 왼쪽 넓적다리에 발생한 고대신경초종 1예를 경험하였기에 자기공명영상 소견을 보고하고자 한다. 자기공명영상에서 불균질한 신호강도와 다결절 소견을 보여 총상(plexiform) 악성 말초신경초종양으로 오인하였다.

• Journal of Korean Neurosurgical Society
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• 제46권4호
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• pp.403-408
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• 2009

A case of spinal intraosseous schwannoma (SIS) in the lumbar vertebra is reported. Clinical and radiologic characteristics of 16 reported cases of SIS were reviewed. SIS can be a rare differential diagnosis for intraosseous tumors.

• Journal of Chest Surgery
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• 제47권3호
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• pp.298-301
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• 2014

A 35-year-old man was admitted to Korea University Anam Hospital for evaluation of intermittent chest pain. Computed tomography of the chest showed enlargement of a previously identified anterior mediastinal mass and also a well-defined, circumscribed mass in the subcarinal area, surrounded by the roof of the left atrium, right pulmonary artery, and the carina. Complete resection of the intrapericardial tumor was performed through median sternotomy without cardiopulmonary bypass. Pathologic examination identified the tumor as schwannoma, of an ancient type, diffusely positive for the S-100 antigen. Unlike other reported cases, grossly, the tumor did not seem to be involved with any nerve.

• 대한세포병리학회지
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• 제19권1호
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• pp.41-46
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• 2008

In an attempt to better define the cytologic characteristics of schwannomas, we have reviewed aspirates and corresponding histologic sections from 23 schwannomas. Of this number, the original cytologic diagnoses were: schwannoma in 14 cases (61%), benign soft tissue tumor in 2 cases (9%), and insufficient specimen in 7 cases (30%). The cytologic findings common to all cases of schwannoma included fragments of tightly cohesive fascicles with variable cellularity and corresponding Antoni type A area. The Antoni type B area, consisting of scattered spindle cells and some histiocytes and lymphocytes against a myxoid background, was seen in 14 cases. Fibrillary stroma was seen in 12 cases. The tumor cells had spindle- or ovalshaped nuclei, with pointed ends and indistinct cell borders. Nuclear palisading was seen in 10 cases, and distinctive Verocay bodies were seen in 5 cases. In ancient schwannomas, there were no Verocay bodies. Most schwannomas have distinct cytomorphologic features that allow correct diagnosis. The major problem with fine needle aspiration cytology of these tumors is the high frequency of poor cellularity, particularly in lesions with cystic degeneration. Of 7 cases with insufficient specimen, 4 showed marked cystic changes and 1 showed marked hyaline changes on histologic sections. In conclusion, we believe that if cytopathologist reminds the situation such as cystic degeneration or hyaline degeneration, the correct diagnosis of the schwannoma will be easily made.