Radiological insights into diverticulitis: Clinical manifestations, complications, and differential diagnosis

Figure 3 Sartelli stage 1A and stage 1B diverticulitis. A: On contrast-enhanced axial computed tomography (CT) imaging, colonic wall thickening, fat stranding, and pericolic air bubbles were observed in the sigmoid colon, consistent with Sartelli stage 1A diverticulitis (orange arrow); B: Contrast-enhanced axial CT imaging revealed findings consistent with Sartelli stage 1B diverticulitis, including colonic wall thickening, pericolic fat stranding, and a fluid collection measuring approximately 2.5 cm on the anterior aspect of the sigmoid colon, indicative of an abscess (yellow arrow).