[Preoperative Metallic Stent Placement and Neoadjuvant Chemotherapy for Locally Advanced Sigmoid Colon Cancer with Obstruction and Invasion of the Psoas Muscle-A Case Report].

A 77-year-old man was diagnosed with obstructive sigmoid colon cancer invading the psoas major and iliac muscles. To avoid the postoperative paralysis of the lower limb, a self-expandable metallic stent(SEMS)was placed, and systemic chemotherapy was administered subsequently. After 4 courses of SOX, Hartmann's procedure was performed. The patient did not develop lower limb paralysis and is alive without recurrence 2 years and 3 months postoperatively. This case suggests that preoperative metallic SEMS placement and neoadjuvant chemotherapy could be an effective treatment for locally advanced colon cancer with obstruction and invasion of the adjacent tissues.