The clinical dilemma of the persistent idiopathic pneumoperitoneum: A case report

INTRODUCTION: Idiopathic pneumoperitoneum (IP) is a rare phenomenon which merits special attention. It is defined as free intraperitoneal air which is not caused by viscus perforation and does not require surgical intervention. It is generally considered a diagnosis of exclusion and often poses a genuine diagnostic dilemma. PRESENTATION OF CASE: We present an unusual case of persistent pneumoperitoneum with no identifiable cause which was found incidentally on a computed tomography (CT) scan in a patient with chronic cough and no prior surgical history. Serial consults revealed no abdominal symptoms or signs. He was managed conservatively and remains asymptomatic despite having a persistent IP on serial radiology. DISCUSSION: To our knowledge, our case is the first in the literature of an idiopathic pneumoperitoneum that persisted on subsequent radiology and was managed successfully without surgical intervention. This is a highly important case for all practicing general surgeons to learn from as knowledge of this phenomenom may help avoid unnecessary surgical intervention and potential morbidities associated with this. CONCLUSION: IP is a diagnosis of exclusion which should only be made after surgical and non-surgical causes have been outruled. In the absence of signs of peritonitis and evidence of gastrointestinal perforation on CT, a conservative approach is warranted, allowing patients to avoid unnecessary surgical intervention.