Tumor resection
Patients unable to receive complete resection or at high risk of rupture underwent biopsy prior to treatment. Tumor resection was considered when primary tumor shrank approximate to 2cm × 3cm to minimize risk of rupture or spillage during resection. Tumor resection field included the tumor pseudocapsule and en-bloc coccyx bone as possible. Tumors were resected in toto without proof of rupture as possible as surgeons could[2].