Sentinel loop sign

A radiographic sign showing a focal, persistently dilated intestinal loop (usually small bowel) reflecting localized adynamic ileus caused by adjacent intra-abdominal inflammation or irritation.

Causes

• Appendicitis

• Pancreatitis

• Cholecystitis

• Diverticulitis

• Perforated peptic ulcer

• Intra-abdominal abscess

• Peritonitis

• Bowel ischemia

• Abdominal trauma or surgery

• Localized inflammatory processes near the bowel