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PICTORIAL ESSAY
Year : 2021  |  Volume : 36  |  Issue : 3  |  Page : 327-339

Spectrum of flurodeoxyglucose positron emission tomography/computerized tomography findings in tumors and tumor-like conditions of the musculoskeletal system


Department of Nuclear Medicine and Molecular Imaging, Tata Memorial Hospital, Homi Bhabha National University (HBNI), Mumbai, Maharashtra, India

Correspondence Address:
Dr. Nilendu C Purandare
Department of Nuclear Medicine and Molecular Imaging, Tata Memorial Hospital, Homi Bhabha National University (HBNI), Parel, Mumbai - 400 012
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijnm.ijnm_242_20

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Bone and soft-tissue tumors display a wide range of metabolic activity on flurodeoxyglucose positron emission tomography/computerized tomography (FDG PET/CT) imaging due to their varying histopathological features. Several benign tumors show high FDG uptake similar to that seen in malignant lesions and their metabolic characteristics can overlap. Certain benign tumors can potentially undergo malignant transformation and FDG PET/CT can play an important role in detecting malignant change. The intensity of metabolic activity on FDG PET/CT correlates with histological grade of malignant tumors and also acts as a valuable prognostic factor. FDG PET/CT plays an important role in the staging work up of bone and soft-tissue malignancies. It has been found to be superior to conventional imaging techniques primarily for detecting distant metastatic disease. Because of its ability to detect metabolic changes, FDG PET/CT is a very useful in assessing response to treatment. Metabolic response seen on FDG PET is a powerful surrogate marker of histopathological response to chemotherapy. The purpose of this article is to study the variable patterns of FDG uptake in tumors of the musculoskeletal system, describe the clinical utility of FDG PET/CT in predicting malignant change in benign tumors and discuss its role in staging, response assessment, and prognostication of malignant lesions.


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