Abou Shaar Bader, El-Karim Ghassan Awad, Alsaied Abdul Rahman, Almalki Nadeem, Ashraf Nader, Almalki Ameera, Duggal Rishi, Munir Sohaib
College of Medicine, Alfaisal University, Riyadh, Saudi Arabia.
Department of Diagnostic Imaging, Bluewater Health, Sarnia, ON, Canada.
Radiol Case Rep. 2023 Apr 6;18(6):2126-2135. doi: 10.1016/j.radcr.2023.03.009. eCollection 2023 Jun.
Extraskeletal osteosarcoma (ESOS) is a rare malignant mesenchymal soft tissue tumor that usually arises in the lower extremities. It is typically a high-grade malignancy that represents only around 1%-2% of all soft tissue sarcomas and 2%-4% of all osteosarcomas. In this report, we describe a case of a 67-year-old female who presented with a 4-day history of a painless lump in her posterior right thigh. Workup utilizing different imaging modalities yielded a diagnosis of ESOS. The radiologic features of ESOS, as well as the current treatment paradigm and prognosis of this rare malignancy, will be discussed based on a review of the literature.
骨外骨肉瘤（ESOS）是一种罕见的恶性间叶性软组织肿瘤，通常发生于下肢。它通常是一种高级别恶性肿瘤，仅占所有软组织肉瘤的1%-2%，占所有骨肉瘤的2%-4%。在本报告中，我们描述了一例67岁女性患者，她右大腿后部出现无痛性肿块，病程4天。通过使用不同的影像学检查手段进行检查后，诊断为骨外骨肉瘤。本文将基于文献综述，讨论骨外骨肉瘤的放射学特征，以及这种罕见恶性肿瘤的当前治疗模式和预后。
