Risk of Malignancy and Outcomes of Surgically Resected Presacral Tailgut Cysts: A Contemporary Review of the Mayo Clinic Experience

Aim

The aim of this study was to describe the surgical management, outcomes, and risk of malignancy of presacral tailgut cysts.

Methods

A retrospective analysis of all patients who underwent resection of tailgut cyst at Mayo Clinic Arizona, Florida, and Minnesota between 2008 and 2020 was performed. Demographics, presentation, evaluation, surgical approach, postoperative complications, pathology, and recurrence rates were reviewed.

Results

Seventy-three patients were identified (81% female) with a mean age of 45 years. Thirty-nine patients (53%) were symptomatic, most commonly with pelvic pain (26 patients). Digital rectal examination identified a palpable mass in 68%. Mean tumour size was 6 cm. Resection was primarily performed through a posterior approach (77%, n=56), followed by a transabdominal approach (18%, n=13), and combined approach (5%, n=4). Six patients underwent a minimally invasive resection (laparoscopic/robotic). Coccygectomy or distal sacrectomy was performed in 41 patients (56%). Complete resection was achieved in 94% of patients. Thirty-day morbidity occurred in 18% and was most commonly wound related; mortality was nil. Malignancy was identified in six patients (8%). For the 30 patients with follow-up greater than 1 year, the median follow-up was 39 months (range, 1.0 - 11.1 years). Local recurrence was identified in three. Distant metastatic disease was observed in one patient.

Conclusion

The rate of malignancy in presacral tailgut cysts based on this contemporary review was 8%. Overall recurrence was 5% at a median of 24 months.

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