PMC3395694_01
A. PET showing three focal lesions in the fifth right rib (thick white arrows), D10 vertebral body (thin white arrow), and right ischium (black arrow). Only the lesion of the fifth right rib was evident at CT images (arrowhead). B. PET showing complete disappearance of the lesions after lenalidomide therapy.
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CT/PET using 18F labelled with Fluorodeoxyglucose (18F-FDG) as positron-emitting radionuclide (Figure 1 A) showed three hypermetabolic focal lesions in the fifth right rib (thick white arrows), D10 vertebral body (thin white arrow), and right ischium (black arrow), with standardized uptake value (SUV) of 14.8 (normal cut off 2.5), 3.3, and 9.3, respectively. Six-month follow-up PET-CT showed a complete disappearance of the lesions (Figure 1 B), that was confirmed one year later.