Pneumatosis intestinalis is a rare clinical finding detected radiologically and intraoperatively that points to an underlying benign or worrisome cause. Management of pneumatosis intestinalis poses an interesting dilemma for surgeons given the heterogeneity of its potential causes. In clinically significant pneumatosis, urgent surgical management is paramount. However, in benign causes of pneumatosis, surgical exploration is not necessary and maybe harmful. Clinical findings of peritonism, increased lactate and radiological finding porto-mesenteric venous gas are suggestive of clinically significant pneumatosis that warrants surgical management. In this case report, we described an incidental computed tomography (CT) finding of extensive pneumatosis in an elderly man with appendicitis.