Figure 7a. Bulging papilla from papillitis in a 35-year-old man. The papillitis may have been due to a recently passed stone. (a) Contrast-enhanced CT scan shows bulging of the papilla with intense mucosal enhancement (arrow), but there is no evidence of stones. (b) Endoscopic image shows the edematous papilla with petechia. As at CT, however, there was no evidence of stones at ERCP.