Findings supportive of the diagnosis of appendicitis include 4:

• aperistaltic, non-compressible, dilated appendix (>6 mm outer diameter)
• appendicolith
• distinct appendiceal wall layers
• echogenic prominent pericaecal fat
• periappendiceal fluid collection
• target appearance (axial section)

Confirming that the structure visualized as the appendix is clearly essential and requires demonstration of it being blind-ending and arising from the base of the cecum.