Diffuse Skeletal Uptake on F-Fluoro-2-Deoxy-d-glucose Positron Emission Tomography/Computed Tomography Scan in a Patient with Acute Lymphoblastic Leukemia: A Typical Superscan Pattern Resembling NaF Positron Emission Tomography Scan.

A 65-year-old patient with acute lymphoblastic leukemia presented for an fluoro-2-deoxy-d-glucose positron emission tomography computed tomography (FDG PET) after several courses of chemotherapy for metastatic evaluation. Unexpectedly, on FDG PET scan, no discernible uptake was observed in the visceral organs, but instead, the skeleton/bone marrow showed homogenously intense metabolic activity. The distribution of FDG observed on the scan was remarkably similar to that on the NaF PET scan, indicating a superscan appearance.