Sigmoid carcinoma with sigmoid-rectal intussusception presenting as rectal prolapse and large bowel obstruction in the ED
Abstract Background Intestinal obstruction is a surgical emergency with most cases being small bowel obstruction. Large bowel obstruction is comparatively uncommon and colonic malignancies are a usual cause. Such lesions cause intestinal obstruction by luminal narrowing or rarely serve as lead point of intussusception. Case presentation Herein, we describe an unusual case of sigmoid carcinoma causing sigmoid-rectal intussusception, rectal prolapse, and eventually large bowel obstruction. Conclusion Pre-operative CT should be done in all adult large bowel obstruction to look for possible site and cause of obstruction and to rule out malignancy as a cause of obstruction. Conversely, every case of rectal prolapse should be diligently evaluated to rule out intussusception, which if present in an adult indicates a high likelihood of underlying malignancy.