Fig. 9

Following the introduction of adjuvant immunotherapy for resected stage IIIC disease, despite normal CT appearances (A, middle panel), fused ¹⁸F-FDG PET/CT (B, middle panel) and MIP (C, middle panel) images revealed intense uptake throughout the large bowel with a typical “string of pearls” distribution. The patient was asymptomatic at the time of the scan but within 24-h had developed severe diarrhea consistent with this diagnosis. Despite successful treatment of this complication the patient subsequently developed bilateral trochanteric bursitis as a second potential irAE