Palliative treatments for malignant stenosis or obstruction of the colon include surgical and interventional therapy options. With an acceptable risk level, palliative tumor resection is the treatment of choice depending on tumor location, tumor extension, and others. If surgical therapy is not a reasonable option, an alternative option would be the implantation of a stent.Unfortunately, the implantation of a stent through the anus can often be difficult or impossible because of factors such as the inability to pass a guide wire through the lesion due to complete obstruction or obstruction over a long segment, as well as anatomic difficulties such as a severely angulated and "fixed" sigmoid, which prevents advancement to the site of the lesion (1). Although some of these factors can be surmounted, it is not always the case. In this case, inability to pass a guide wire through the lesion was due to a long segmental obstruction, which made stent implantation impossible. However, it was made possible through the anus with the assistance of percutaneous colostomy. This strategy was allowed with the permission of the patient and his family prior to the procedure.The use of percutaneous colostomy for the implantation of a stent has been described in a prior study (2). But, in our case, the use of percutaneous colostomy assisted the implantation of a stent through the anus, with several advantages.
Case ReportA 52-year-old man with progressive abdominal bloating and constipation was referred to our interventional radiology department. The patient had a history of pancreatic cancer with invasion in the celiac trunk and splenic artery and had been treated with radiation and chemotherapy. On contrast material-enhanced computed tomography (CT) of the abdomen, luminal narrowing of the sigmoid colon accompanying distention of proximal colon was observed. A sigmoidoscopy performed after two weeks showed poor bowel preparation, rectal hemorrhage without a definite bleeding focus or mass. A barium enema, performed 2 days after the sigmoi- We present a patient with disseminated pancreatic cancer who presented with symptoms of acute obstruction of the sigmoid colon. It was not possible to pass the region of the obstruction with a guide wire under colonoscopy and fluoroscopy. Consequently retrograde implantation of stents was performed successfully with the assistance of a minimally-sized colostomy when compared with a previously described procedure in the literature.