The CT features are most consistent with appendicular mucocele.

The curvilinear mural calcification seen on CT suggests the diagnosis but is seen in less than 50% of cases. 

When identifying a mucocele on CT, a search for extraluminal mucin is mandatory, which are low attenuation deposits commonly seen in certain locations:

• periappendiceal space 

• peritoneal cavity

• at the surface of abdominal viscera, including ovaries and bowel