Pneumoperitoneum without peritonitis

  • Silent perforation of viscus that seals itself: elderly, patients on steroids, unconscious patients, presence of other serious medical conditions
  • Post-operative (up to 7 days)
  • Peritoneal dialysis
  • Perforated cyst in pneumatosis intestinalis
  • Tracking down from pneumomediastinum
  • Stercoral ulceration
  • Vaginal-tubal entry of air