Figure 7a. Ruptured appendiceal mucocele in a 72-year-old man with right-sided pelvic pain and abnormal appearance of the appendix at prior CT performed at another institution. (a) Coronal T2-weighted single-shot fast SE image shows the cecum (C), normal terminal ileum (black arrowheads), and bladder (B). A thick-walled appendix (arrow) is present, surrounded by an irregularly shaped fluid collection (white arrowheads). (b) Axial T2-weighted fast SE image shows cystic dilatation of the appendiceal tip (*) and periappendiceal free fluid (arrowheads), findings suggestive of a ruptured appendiceal mucocele. A ruptured mucocele secondary to an appendiceal cystadenoma was found at surgery and pathologic analysis.