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18F-FDG PET/CT in Isolated Primary Extraskeletal Osteosarcoma

Parihar, Ashwin Singh, MBBS*; Mittal, Bhagwant Rai, MD, DNB*; Vadi, Shelvin Kumar, MD*; Sood, Apurva, MD*; Kumar, Rajender, MD*; Goni, Vijay, MS

doi: 10.1097/RLU.0000000000002293
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Extraskeletal osteosarcoma is a rare, high-grade soft tissue malignancy, accounting for approximately 1% of all soft tissue sarcomas. Despite the histologic resemblance to osteogenic osteosarcoma, it is considered as a distinct entity because of the differences in clinical behavior and response to treatment. Hence, imaging plays a vital role in establishing the nonskeletal origin of the tumor, differentiating it from osteogenic osteosarcoma. We present 18F-FDG PET/CT findings in a case of isolated primary extraskeletal osteosarcoma confirmed on histopathology.

From the Departments of *Nuclear Medicine and PET/CT and

Orthopaedics, Post Graduate Institute of Medical Education and Research, Chandigarh, India.

Received for publication July 17, 2018; revision accepted August 18, 2018.

Conflicts of interest and sources of funding: none declared.

Correspondence to: Bhagwant Rai Mittal, MD, DNB, Department of Nuclear Medicine, Post Graduate Institute of Medical Education and Research, Chandigarh 160012, India. E-mail: brmittal@yahoo.com.

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