Figure 3.

Esophageal cancer pre- and post-treatment. (a) Pre-treatment axial fused FDG PET-CT image shows a circumferential hypermetabolic esophageal tumor (white arrow); (b,c) Axial (b) and coronal fused FDG PET-CT images five weeks post-neoadjuvant CRT demonstrate residual soft tissue thickening and metabolic activity (white arrow), although improved from pre-treatment. This would require biopsy to distinguish residual viable tumor from post-treatment inflammatory change. In addition, there is increased metabolic activity along the left border of the liver (white arrowhead) likely due to the liver being within the radiation field.