VP3: Pelvic Reconstruction After Large Sacral Chordoma Resection Using Acellular Dermal Matrix and Double Pedicled Gracilis Muscle Flap Combined with Gluteal Fasciocutaneous Rotation Flap

Abstract

INTRODUCTION: Sacral chordomas are rare, malignant primary bone tumors. Surgical resection with wide margins, combined or not with radiotherapy, is the only effective treatment with near 50% remission at 10 years. Surgery results in large three dimensional defects, as total or subtotal sacrectomy is often required. The treatment is challenging and requires a multidisciplinary approach. Several reconstructive approaches have been described, classically including rectus abdominis or gluteus musculocutaneus flap and omental flap. We aim at presenting an innovative method of pelvic floor reconstruction using acellular dermal matrix and double pedicled Gracilis muscle flap combined with gluteal fasciocutaneous rotation flap. MATERIALS AND METHODS: We report the case of a 70 yo patient affected by locally invasive sacral chordoma. The oncological treatment included neuronavigation-assisted subtotal sacrectomy with en bloc resection at the level of S1-S2 intervertebral disc and laparoscopic abdomino-perineal amputation with terminal colostomy. After the R0 resection was confirmed, pelvic floor was reconstructed with an acellular dermal matrix and a double-breasted pedicled muscle Gracilis flap to avoid herniation of the abdominal cavity organs. The overlying soft tissue defect was reconstructed with an unilateral gluteal fasciocutaneous rotation flap partially deepitelialized to fill the dead space. The donor sites were closed directly. RESULTS: No surgical complications were observed, with flaps and donor sites healing uneventfully. After 3 days in intermediate intensive care and 22 days in plastic surgery department, he was transferred to rehabilitation center. Walking was reassumed after 2 weeks, sitting after 4 weeks. Satisfying outcomes both functionally and cosmetically for both patient and surgeons were observed at 3 months follow-up. CONCLUSION: Large sacral defect can successfully be reconstructed with double pedicled muscle Gracilis flap combined with gluteal rotation flap. The association with acellular dermal matrix is recommended to avoid abdominal cavity organs herniation. The oncological, functional results at 3 months are satisfying with minimal donor site morbidity. Presentation Type