Figure 3.

Coronal CT (a) demonstrating left cervical and right paratracheal lymphadenopathy (white arrows) and mild splenomegaly (white arrowhead) consistent with high-grade follicular lymphoma. Corresponding coronal fused FDG-PET/CT (b) demonstrates increased radiotracer uptake in the pathologically enlarged left cervical and right paratracheal lymphadenopathy (white arrows) and spleen (white arrowhead), but also abnormal FDG accumulation in right cervical and left external iliac lymph nodes (white arrows) that appeared normal by size criteria on the corresponding CT scan. Coronal PET MIP (c) in the same patient demonstrating widespread increased radiotracer uptake throughout the neck, thorax, abdomen, and proximal humeri and femora bilaterally; the widespread bone marrow involvement was not apparent on CT.