FIGURE 4. Coronal PET/CT (A), transaxial CT (B), and transaxial PET/CT (C) images from 42-y-old woman after recent intake of ciprofloxacin show segmental 18F-FDG accumulation in ascending colon with correlative circumscribed mural thickening (arrows). Pseudomembranous colitis was confirmed after cultivating Clostridium difficile in stool probes.