• Maxillofacial Plastic and Reconstructive Surgery
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• v.33 no.5
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• pp.430-434
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• 2011

Extraskeletal osteochondroma is an uncommon benign tumor that arises in soft tissues lacking continuity with an adjacent bone and joint. Due to similar histopathological findings, extraskeletal osteochondroma is often misdiagnosed for a conventional osteochondroma, the most common benign tumor that arises from the epiphyseal plates of long bones. The pathogenesis of extraskeletal osteochondroma is unclear, but metaplasia of synovial mesenchymal tissue is the best supported etiology. The most common sites of extraskeletal osteochondroma are the hands and feet, and it is rarely found in the maxillofacial area. We present a case of a two-year-old boy with a giant extraskeletal osteochondroma that developed in the masticatory space of the mandible along with a review of the relevant literature.

• Journal of Chest Surgery
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• v.25 no.10
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• pp.1107-1111
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• 1992

Extraskeletal Ewing`s sarcoma was first reported by L. Angervall and F.M. Enzinger in 1975. Clinically the tumor affects mainly young adults and children The extraskeletal Ewing`s sarcoma are mainly involved the soft tissues of the trunk and lower extremity. Microscopically. extraskeletal Ewing`s sarcoma is indistinguishable from the Ewing`s sarcoma of bone. We recently experienced a case of extraskeletal Ewing`s sarcoma of the anterior chest wall in a 13-year old female. The patient underwent local wide excision and postoperative radiation and combind chemotherapy were done. This group of tumors has been rarely reported in Korea. We presented a case of extraskeletal Ewing`s Sarcoma in the anterior chest wall with reviw of world literature.

• Journal of Chest Surgery
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• v.18 no.4
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• pp.867-871
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• 1985

The Ewing`s sarcoma is the primary malignant bone tumor but the tumor also occurs as a primary soft tissue neoplasm without involvement of bone. Here is presented a case of extraskeletal Ewing`s sarcoma in the posterior and superior mediastinum with review of literature. To our knowledge, this is the first case report of extraskeletal Ewing`s sarcoma in Korea.

• The Journal of the Korean bone and joint tumor society
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• v.19 no.2
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• pp.64-68
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• 2013

Extraskeletal chondroma is a benign soft tissue tumor which is composed of hyaline cartilage but arises from the fibrous stroma rather than from mature cartilaginous or osseous tissue. Extraskeletal chondroma is relatively rare and occurs most frequently in the soft tissue around the joints of hands and feet. We present one case of extraskeletal chondroma in a finger of a young woman.

• Journal of Chest Surgery
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• v.26 no.5
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• pp.413-416
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• 1993

Extraskeletal osteogenic sarcoma is a rare malignant tumor of soft tissue, and its predilection sites are the extremity, retroperitoneum, trunk, and the head and neck area. To our knowledge 5 cases of primary involvement of the mediastinum have been reported. Because of its rarity and difficulty in exact diagnosis preoperatively, we report an extraskeletal osteogenic sarcoma in the anterior mediastinum. The patient was a thirty eight old male. He complained of cough and sputum over 2 months. The chest roentgenogram and the chest MRI[magnetic resonance image] were done and showed anterior mediastinal mass with calcification. Excision of the mass was done under the preoperative impression of thymoma, and the pathologic report was extraskeletal osteogenic sarcoma of the mediastinum.

• The Journal of the Korean bone and joint tumor society
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• v.15 no.2
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• pp.104-110
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• 2009

Purpose: Compared to soft tissue sarcoma, the relative risk of extraskeletal osteosarcoma is still not clear. The purpose of this study is to identify the difference in survival and local recurrence rate between two soft tissue sarcomas. Materials and Methods: Twelve patients with pathologically confirmed extraskeletal osteosarcoma were analysed. For retrospective matched case-control study, we selected 72 patients who were confirmed as high grade soft tissue sarcoma and had similar tumor location, tumor size and age to extraskeletal osteosarcoma. Results: Median age was 50 years old. Five cases were located in upper extremity, four in the buttocks, three in the lower extremity. Overall survival rate of extraskeletal osteosarcoma group and high grade soft tissue sarcoma group at 5 years were 52% and 55%. There is no significant difference (p=0.8). Local recurrence rate and metastasis rate were 58%, 67% in extraskeletal osteosarcoma group and 36%, 51% in soft tissue sarcoma group, which were not stastistically significant(p=0.2, p=0.4). Conclusion: Extraskeletal osteosarcoma have similar local recurrence, metastasis and survival rate compare to high grade soft tissue sarcoma. The number of patients of this study were too small to identify outcome of extraskeletal osteosarcoma. Further multi-institutional study should be attempted.

• Journal of Korean Neurosurgical Society
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• v.45 no.3
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• pp.179-181
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• 2009

Ewing's sarcoma usually arises from skeletal bone, but rarely may have an extraskeletal origin. However, Ewing's sarcoma that originates around the spinal column, especially, the intradural extramedullary type is extremely rare. We report a rare case of primary intraspinal extraskeletal Ewing's sarcoma.

• Journal of Chest Surgery
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• v.28 no.12
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• pp.1192-1196
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• 1995

As reported in the literature, extraskeletal mesenchymal chondrosarcoma is a rare malignant tumor of soft tissue, and it has a unique, distinctive histologic picture and poor prognosis.The common sites are the orbit, the cranial dura mater, the neck, the thigh, the leg, the chest wall, and the retroperitoneum. Radical excision of the tumor seems to be the primary treatment.We report experience with a very rare case of extraskeletal mesenchymal chondrosarcoma in the posterior mediastinum.

• Journal of Korean Foot and Ankle Society
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• v.6 no.1
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• pp.129-133
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• 2002

Extraskeletal myxoid chondrosarcoma is an unusual soft tissue sarcoma with distinctive histologic features. It once was called chordoid sarcoma because it resembles chordoma histologically. The lesion has been shown to be of chondroblastic origin. This lesion shown to have ultrastructural and molecular features distinct from that of myxoid chondrosarcoma of bone. We report a case of extraskeletal myxoid chondrosarcoma in forefoot.

• Tuberculosis and Respiratory Diseases
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• v.44 no.5
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• pp.1158-1165
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• 1997

Extraskeletal Ewing's sarcoma is a very rare tumor which was first reported by Angervall and Enzinger in 1975. The common sites of extraskeletal Ewing's sarcoma are bony structures of lower extremities, paravertebral region, and pelvis, but rarely chest wall. Microscopically, extraskeletal Ewing's sarcoma is indistinguishable from the Ewing's sarcoma of bone. We present here a case of extraskeletal Ewing's sarcoma of the left lateral chest wall in a 19-year-old male. Wide extirpation and postoperative combined chemotherapy were done, and we discuss the clinical picture, histopathology, therapeutic management, and prognosis with review of the literature.