Figure 1

Axial short T1 inverted recovery sequences (a) shows a regular appendiceal fluid-filled mass. On T2-weighted sequences the mass is hyperintense (b, coronal view and d, sagittal view) and on T1-weighted sequences hypointense (c, sagittal view). The mesentery is edematic (c and d, white arrows), the base of the mucocele is indistinguishable from the appendix (c and d, *) and the mucocele is surrounded by fluid (a, white arrow) indicative of reactive inflammation and torsion.