Postoperative Analgesia Using Multiple Erector Spinae Plane Catheters in a Single-Stage Surgery for Synchronous Breast and Colon Cancer: A Case Report.

We report postoperative analgesia using multiple erector spinae plane block (ESPB) catheters in a patient undergoing single-stage surgery for synchronous breast and colon cancers. A 60-year-old woman underwent left mastectomy and laparoscopic right hemicolectomy. Three ESPB catheters (T4 left, bilateral T9) were placed after induction and maintained with programmed intermittent bolus ropivacaine. Analgesia was effective, opioid use was minimal, and early mobilization was achieved without block-related complications. Multicatheter ESPB may provide safe, effective thoracoabdominal analgesia within enhanced recovery after surgery (ERAS) pathways for complex synchronous procedures.