Inversion or intussusception of the appendix

摘要

Abstract Two cases of intussusception or inversion of the appendix are highlighted. One patient presented with chronic right iliac fossa pain and at laparoscopic surgery was noted to have a polypoid lesion at the appendiceal orifice opening into the caecum. The second Case was discovered at routine colonoscopy and thought to be a polypoid caecal tumour. In both cases the appendix had inverted and masqueraded as caecal lesions. Histological evaluation showed the entire circumference of the appendix inside of the appendix lumen simulating a telescoping phenomenon. In the second case the appendix had prolapsed through the orifice and composed of normal appendix with a luminal faecolith. Inverted appendices often show pathology in their walls such as endometriosis or polyps but a significant proportion are "normal". They tend to occur in females and range from being asymptomatic to having acute and/or chronic abdominal pain.