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F. Abtin
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MINI 25 - Trials, Radiation and Other (ID 142)
- Event: WCLC 2015
- Type: Mini Oral
- Track: Thymoma, Mesothelioma and Other Thoracic Malignancies
- Presentations: 2
- Moderators:J.M. Clavero, R. Hassan
- Coordinates: 9/08/2015, 16:45 - 18:15, 702+704+706
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MINI25.09 - Percutaneous Cryoablation for Recurrent Mesothelioma following Lung Sparing Pleurectomy and Decortication: Safety and Efficacy (ID 3206)
16:45 - 18:15 | Author(s): F. Abtin
- Abstract
- Presentation
Background:
Percutaneous cryoablation (PC) is an ablative technique, being used for local treatment of recurrent mesothelioma in patients following surgical lung sparing decortication and pleurectomy, and occasionally for palliative control of tumor extension to vital structures or pain control. The purpose of this study was to evaluate the safety and efficacy of PC in local control of recurrent mesothelioma.
Methods:
With IRB approval, patients with recurrent mesothelioma following lung sparing pleurectomy and decortication with at least one PC were identified from a database containing ablation information. Intra procedural and immediate post procedural hospital information was assessed for complications and follow up imaging was used to asses for late complications and recurrence. Patients were followed with CT and and PET/CT scans for 6 and some up to 12 months. Local recurrence determined by increased regional metabolic activity or increased size of post ablation zone at 6 months. A stepwise multiple logistic regression model was used to assess predictors of local recurrence after ablation, considering clinical variables including: stage at diagnosis, chemotherapy, radiation, recurrence time lag following surgery, and number of lesions at time of recurrence presentation, And PC variables including: size of the lesion, edge of ice ball beyond the tumor, number of probes, size of probes, number of cryo cycles, maximum and total freeze and thaw time.
Results:
From the database, 25 patients were identified who underwent a total of 117 outpatient cryoablations (range of 1-25). 4 ablations in 3 patients were performed for palliative and pain control indications. Lesions measured a mean of 32.5 mm (range 9-113) by 18.0 mm (range 6-60) in diameter. At 6 months 110/117 (94.0%) of ablations showed no recurrence. No major, but minor complications including hematoma, small pneumothorax and hemoptysis in one patient each and erythema in 3 chest wall subcutaneous lesions (5/117 =4.2%). Late complications in 4/117 (3.4%) ablations. Considering the clinical and cryoablation variables no recurrence was seen in patients having the edge of iceball more than 7 mm beyond the tumor.
Conclusion:
PCT can be used for management of recurrent mesothelioma following surgery with low recurrence rate of 6%, and limited procedural complications 4.2% and late complications of 3.4%. When performing PCT, at least 7 mm of the of iceball is needed to extend beyond the edge of tumor to limit local recurrence.
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MINI25.12 - Hospital Resource Utilization and Outcomes of Pleurectomy Compared to Extrapleural Pneumonectomy for Mesothelioma (ID 2539)
16:45 - 18:15 | Author(s): F. Abtin
- Abstract
Background:
Although extrapleural pneumonectomy (EPP) and pleurectomy/decortication (P/D) provide similar survival in malignant pleural mesothelioma (MPM), we sought to compare the two procedures in terms of another important outcome" hospital resource utilization (RU).
Methods:
With IRB approval, we retrospectively reviewed our prospective database to determine RU (ICU and hospital stay, mechanical ventilation, and central line use, etc) and Kaplan-Meier median survival (MS) for patient undergoing P/D. Our results are compared with similar findings for EPP reported in the literature.
Results:
We identified 121 pts on an "intent to treat" basis from 1997-2011. 94 (77.7%) were male. Mean age was 65.9 yrs (range 27-84). Comorbidities included hypertension 45.5%, coronary artery disease 11.6%, diabetes 10.7%, and vascular disease 6.2%. Mean surgical time was 7 hrs 57 mins (range 3 hrs 15 min–14 hrs 21 min). R1 resection was achieved in 116 (95.9%). Microscopic "margins" were assessed in 63 with 40 (63.5%) positive. Pathologic T- and N-staging is shown in Table 1. Morbidity was mostly limited to air leaks >10 days 41 (33.9%) and atrial arrhythmias 38 (31.4%). Three patients (2.5%) died. Relevant RU data included: intraoperative CVP lines 3 (2.5%), OR extubation 113 (93.4%), no ICU stay 99 (81.7%), and mean hospital stay 10 (range 5-103) days. RU data with P/D + RTx is compared to EPP as reported by others (figure 1). MS was 13.8 mos for all patients and 17.8 mos for epithelioid histology, which was better than biphasic (10.3 mos) and sarcomatoid (2.1 mos) subtypes (p<0.01). MS for 85/121 patients (70.2%) who completed P/D + RTx was 19.7 mos. MS for similar groups of EPP patients is reportedly 16.8-19 mos (eg, Thorac Cardiovasc Surg 1999;117(1):54-65 and J Clin Oncol 2009;27(18):3007-13).Conclusions: P/D +RTx provide essentially the same outcomes as EPP with less use of hospital resources
Figure 1T Stage N Stage 0 0 57(47.1%) 1 0 3(2.5%) 2 24(19.8%) 58(47.9%) 3 70(57.9%) 0 4 27(22.3%) -
Conclusion:
P/D provides essentially the same outcomes as EPP with less use of hospital resources.
