What is the role of imaging studies in the workup of postradiation sarcoma (PRS)?

Updated: Jul 01, 2020
  • Author: Nagarjun Rao, MD, FRCPath; Chief Editor: Omohodion (Odion) Binitie, MD  more...
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Answer

Plain radiographs should be obtained in two planes. Cortical bone destruction is the most common finding. A mineralized soft-tissue mass is seen in most patients. Changes such as osteopenia and sclerosis are seen in a minority of patients.

If plain radiography yields normal findings and the patient has significant pain, computed tomography (CT) and magnetic resonance imaging (MRI) are useful for identifying abnormal areas in the medullary cavity, cortical bone destruction, and the presence of an extramedullary soft-tissue mass. MRI is the best modality for detecting soft-tissue involvement in PRS. Chest CT is performed to detect pulmonary metastases.

Technetium bone scanning is performed to detect bone metastases.


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