Sacral Resections for Primary Sacral Tumor - an Experience from a Tertiary Care Cancer Center in India.

Primary sacral tumors are uncommon and sacrectomy is a complex surgical procedure with substantial risk of morbidity. We conducted a retrospective study of patients who had undergone sacral resections for primary sacral tumors between 2010 and 2020. Ten sacral resections including five type 1 sacrectomy (S1 resected), four type 2 (S1 spared), and one type 3 (S3 spared) were performed during the above period. The median age was 47 years and the most common histologic diagnosis was chordoma (50%). The median operating time was 705 min (range 180-960 min) with a median blood loss of 3400 ml (range 500-7000 ml) and a median duration of hospital stay of 13.5 days (range 7-68 days). All patients who underwent type 1 sacrectomy experienced major complications (Clavien-Dindo grade 3 or above) including one death in the immediate perioperative period. Microscopically positive margins (R1) were noted in two patients (20%). All patients with type 1 sacrectomy had R0 resection. The median follow-up period was 31 months. The median MSTS score was 12 (range 4-27). A total of seven patients (70%) had a minimum follow-up of 2 years without disease recurrence. Sacral resection for primary tumors of the sacrum with oncologically safe margins is feasible. Although associated with substantial perioperative morbidity, a detailed preoperative planning and execution of the surgery by a team of orthopedic oncosurgeon, surgical oncologist, and plastic surgeon offer a hope for survival in patients with acceptable functional outcome.