Histological findings after placement of a self-expanding stent in rectal carcinoma with complete obstruction: Case report

Patients with acute obstruction due to celorectal carcinomas frequently require emergency surgery. However, such emergency procedures are associated with various complications, a high mortality rate and a poor prognosis. If the obstruction could be immediately relieved, the patient could later undergo an elective operation with a much better prognosis. Recently, expanding metallic stents have been used to treat obstruction due to colorectal carcinoma. In the case reported here, we initially inserted a colonoscopic retrograde bowel drainage tube per anus to achieve decompression. We then placed a self-expanding metallic stent, since we anticipated a prolonged preoperative period due to high fever, congestive heart failure, cerebral infarction, and persistent high blood sugar concentrations. The patient had no complications for 57 days after placement of the stent, and eventeally underwent an elective operation. Histologically, the side of the cancerous lesion compressed by the stent was thin and consisted solely of a serosal layer. Implantation of a metallic stent is safe for the treatment of acute malignant obstruction. Stent placement is indicated not only as a pal-liative treatment for inoperable or recurrent cases, but also as a preoperative procedure before elective surgical resection.