Radiology Department, Ataturk State and Education Hospital, Izmir, Turkey.
Clin Imaging. 2012 Jul-Aug;36(4):402-5. doi: 10.1016/j.clinimag.2011.10.016. Epub 2012 Jun 8.
Extraskeletal osteosarcomas are extremely rare, high-grade neoplasms. Approximately 300 cases have been reported in the literature, with a 5-year survival of around 25%-37%. Extraskeletal osteosarcomas frequently arise from lower-extremity, deep soft tissue planes, including hemorrhagic, necrotic areas. While primary osteosarcomas have been observed in the first two decades of life, osteosarcomas arising from the skeletal system are rarely observed before 40 years of age. We present radiological findings of an osteosarcoma case arising from cruris subcutaneous tissue in a young adult (31 years old) at diagnosis and at the follow-up period during a 5-year monitoring process. Additionally, we reviewed the literature regarding this case.
骨外骨肉瘤极为罕见，属于高级别肿瘤。文献中大约报道了 300 例病例，5 年生存率约为 25%-37%。骨外骨肉瘤通常起源于下肢深部软组织平面，包括出血、坏死区域。虽然原发性骨肉瘤发生于生命的前 20 年，但起源于骨骼系统的骨肉瘤很少在 40 岁之前发生。我们展示了一位年轻成人（31 岁）在诊断时和 5 年监测期间出现的源自股部皮下组织的骨肉瘤病例的影像学表现。此外，我们还回顾了该病例的文献。
