Fig. 2

At 3 months post-immunotherapy, [¹⁸F]FDG PET/CT was performed. a Whole-body PET/CT revealed a diffuse increase in tracer incorporation in the thyroid (black arrow) and testicles (black-bordered arrow). Fused axial PET/CT images of the thorax b showed no meaningful tracer uptake in the right hilum (left side) with nearly complete regression of the lung nodules (right side). The fused axial image of the pelvis c did not exhibit pathological uptake in the inguinal region