Presentation
Abdominal right lower quadrant pain and tenderness.
Patient Data
Age: 30 years
Gender: Male
From the case:
Sentinel loop - acute appendicitis
Upright frontal

Focal area of adynamic ileus close to the appendix location.
Case Discussion
Focal area of adynamic ileus close to the appendix location at right lower quadrant in a patient with abdominal pain and tenderness is compatible with a sentinel loop due to acute appendicitis.
The other common scenario in which a sentinel loop is observed is in acute pancreatitis, the adynamic loop occurring adjacent to potentially any inflamed structure.