E-123 Single center experience of treating hospitalized patients with multiple myeloma and thoracolumbar lesions with combined tumor ablation and vertebral augmentation

• Published in: Journal of neurointerventional surgery Vol. 14; no. Suppl 1; p. A143
• Main Authors: Watchmaker, J, Scaggiante, J, Siddiqui, N, Goldman, D, DeLeacy, R
• Format: Journal Article
• Language: English
• Published: BMA House, Tavistock Square, London, WC1H 9JR BMJ Publishing Group Ltd 23.07.2022; BMJ Publishing Group LTD
• Subjects: Ablation; Clinical outcomes; Hospitalization; Length of stay; Pain; Patients; SNIS 19th annual meeting electronic poster abstracts; Success
• ISSN: 1759-8478; 1759-8486
• DOI: 10.1136/neurintsurg-2022-SNIS.234

Background/PurposeChemotherapy, radiation therapy, and opioid analgesia has been the mainstay of treatment for patients with MM and painful bony lesions, with more recent studies and subsequent guidelines supporting early intervention with vertebral augmentation (VA) in select patient groups. While VA addresses the mechanical component of painful fractures/unstable lesions, the addition of heat-based ablative therapy is theorized to decrease pain via local destruction of pain-sensitive nerves, and amelioration of local production of cytokines and growth factors from the tumor. Very limited studies are available describing the combined use of VA with heat-based ablation (HBA). As such, the purpose of our study is to report technical and clinical outcomes of combined VA and HBA performed in hospitalized patients with MM.MethodsRetrospective review of all combined VA and HBA treatments performed in hospitalized patients between October 2007 and October 2021 was conducted. Baseline information including age, gender, indication for VA, prior therapy, and procedural information including location of lesions, number of treated lesions, and approach were recorded. Technical success was defined as ability to complete VA and HBA without peri-procedural complication. Clinical outcomes were assessed based on patient reported pain scores on an 11 point scale (0 indicating no pain, 10 indicating worst pain), by comparing highest pre-procedural pain score to last recorded pain score prior to discharge. Additional data including time between pre-procedural MRI and intervention, hospital length of stay, and post-discharge ECOG score were also recorded.ResultsFifty-nine hospitalized patients underwent combined VA and HBA, of which 11 patients (5 female) with mean age 67.7 ± 8.8 years, had a diagnosis of MM; five of which were newly diagnosed. Indication for treatment with VA for 9 patients was painful compression fracture, and 2 due to risk of impending catastrophic fracture secondary to bony destruction. Thirteen total lesions (7 thoracic, 6 lumbar) were treated. For VA, two patients (both with a single thoracic lesion) were treated with titanium implants, and the remainder of the lesions were treated with cement augmentation. Interventions were performed 6.3±4.0 days following pre-procedural MRI. A unipedicular approach was used for 4 patients (6 lesions), and bipedicular approach for 7 patients. Technical success was 100% with one case of leakage noted at the T5 level, with post-procedural chest CT confirming minimal embolization of cement, and the patient remained without deficits or procedure related complication. There was a statistically significant change in worst pre-operative pain score (8.3±1.9) compared to last pain score prior to discharge (2.1±2.9); non-parametric paired test p=0.001. The median length of stay was 18 days with interquartile range from 12.5–19.5 days. Post-discharge ECOG scores were available for 9 of 11 patients (5 patients ECOG-1; 2 patients ECOG-2; 2 patients ECOG-3).ConclusionCombined VA and HBA demonstrated 100% technical success without major adverse event in the treatment of 13 thoracolumbar lesions. Additionally, patients experienced a significant decrease in reported pain prior to discharge. Future prospective studies are warranted to assess added benefit of HBA to VA.Disclosures J. Watchmaker: None. J. Scaggiante: None. N. Siddiqui: None. D. Goldman: None. R. DeLeacy: None.