RT Journal Article SR Electronic T1 Floating Vertebral Body Cement Ball After High-Viscosity-Cement Vertebroplasty for Lytic Defect: Report of 2 Cases JF International Journal of Spine Surgery JO Int J Spine Surg FD International Society for the Advancement of Spine Surgery SP 594 OP 598 DO 10.14444/7079 VO 14 IS 4 A1 TARUSH RUSTAGI A1 ERIC BOUREKAS A1 EHUD MENDEL YR 2020 UL http://ijssurgery.com//content/14/4/594.abstract AB Background Percutaneous vertebroplasty (PVP) is an effective procedure for painful pathological vertebral fractures. High-viscosity cement is the preferred choice for vertebroplasty given its low risk of extravasation. We describe here 2 cases of high-viscosity cement vertebroplasty in large lytic defects and associated complications.Case Description Case 1 describes PVP in an 89-year-old male patient with L1 pathological fracture from prostrate metastasis. Case 2 describes PVP in a 68-year-old male with T7 and T8 vertebral fractures from multiple myeloma. In both cases, high-viscosity cement was used to fill large lytic cavities. This resulted in poor interdigitation of the cement with the trabeculae forming an unstable floating cement ball and dangerous retrieval of the cement trocar needle. The implications of this occurrence have been described.Conclusions High-viscosity-cement vertebroplasty in large lytic defects needs to be done with caution. The potential occurrence of poor cement interdigitation and the following complications can be catastrophic, and caution must be used.