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MINI 07 - ChemoRT and Translational Science (ID 110)
- Event: WCLC 2015
- Type: Mini Oral
- Track: Treatment of Locoregional Disease – NSCLC
- Presentations: 1
MINI07.13 - Clinical Impact of Frequent Surveillance Imaging in the First Year following Chemoradiation for Locally Advanced Non-Small Cell Lung Cancer (ID 2538)
16:45 - 18:15 | Author(s): N.K. Harandi
Uncertainty exists regarding the optimal surveillance strategy following definitive chemoradiation (CRT) for locally advanced non-small cell lung cancer (LA-NSCLC) with regards to both frequency and modality. We sought to determine the efficacy of frequent (q2-4 month) post-treatment imaging in detecting asymptomatic recurrent disease and document the clinical impact of frequent surveillance imaging.
The records of all patients treated with CRT for stage IIIA/IIIB NSCLC between August 1999 and April 2014 at our institution were reviewed. Patients were included if they underwent frequent (Q2-4 month) chest computed tomography (CT) or positron emission tomography (PET/CT) for routine surveillance following CRT for at least one year following CRT or until disease progression or death. Radiographic findings and clinical interventions from the first year following CRT were identified.
We identified 145 patients with LA-NSCLC treated with CRT, 65 of whom underwent Q2-4 month surveillance imaging for at least one year or until progression or death. Median age was 63.6 years (range, 41.0-86.9 years). Forty-nine (75.4%) also underwent an initial baseline CT within the first 6 weeks following CRT. An asymptomatic recurrence was detected by surveillance imaging within the first year in 40 (61.5%) patients, 31 (77.5%) by CT and 9 (22.5%) by PET/CT. Among these patients, 21 (52.5%) initiated palliative systemic therapy. Three (7.5%) underwent attempted definitive therapy for isolated disease, including one patient treated with definitive lobectomy for what was found to be a histologically distinct new primary early stage NSCLC, and two patients treated with stereotactic ablative radiotherapy for isolated recurrences, both of whom subsequently developed metastatic disease. Urgent palliative local therapies (radiotherapy and bronchoscopy) were performed in 2 patients for impending neurologic and airway compromise, respectively. Ten patients (25%) with recurrences detected on surveillance imaging were not candidates for or declined additional cancer-directed therapy. Seven patients (10.8%) developed a symptomatic recurrence detected between planned scans. Five patients (7.7%) underwent additional diagnostic procedures for false-positive surveillance imaging findings.
Frequent surveillance imaging within the first year following CRT for LA-NSCLC detected asymptomatic recurrences in a high proportion of patients in our population. However, definitive interventions were attempted in less than 5%, and were successful in only one patient. The predominant potential benefit of frequent radiographic surveillance appears to be the expedient initiation of palliative systemic therapy. Evidence-based algorithms for follow-up imaging among this population are needed, and should account for patient-specific factors including expected tolerance of, benefit from, and willingness to undergo systemic therapies.
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