Fig. 13From: A practical guide for planning pelvic bone percutaneous interventions (biopsy, tumour ablation and cementoplasty)A 62-year-old woman presenting with an expansive sacral lesion (dotted line) and no known primary tumour. After discussion with the orthopaedic surgeon, a posterior approach was selected for the biopsy with a 16-G cutting needle and the lesion proved to be a chordomaBack to article page