Author of

• 16751

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  P1.05 - Poster Session with Presenters Present (ID 457)

  • Event: WCLC 2016
  • Type: Poster Presenters Present
  • Track: Early Stage NSCLC
  • Presentations: 1
  • Moderators:
  • Coordinates: 12/05/2016, 14:30 - 15:45, Hall B (Poster Area)

  • 16824

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    P1.05-073 - Evaluation of Stage 1 Sub-Solid Lung Nodules Using PET Imaging (ID 4287)

    14:30 - 14:30  |  Author(s): M.B. Beasley
    • Abstract

    Background:
    Positron emission tomography (PET) scans are valuable in the evaluation of lung nodules. Subsolid (SS:<80% solid) lung nodules, however, often have low levels of metabolic activity and rare metastases. The purpose is to assess PET in the evaluation of SS nodules.
    
    Methods:
    Between 2009-2015, 892 patients had a chest computed tomography (CT) with a SS finding and PET within 6 months, with pathology specimen, at our institution. 50 patients had clinical stage IA/B lung cancer and were retrospectively analyzed. CT analysis further classified these subsolid lesions as nonsolid(NS) and part-solid(PS).
    
    Results:
    26 patients had NS nodules and 24 PS. Mean maximal tumor dimension was not statistically significantly different between the groups (mean±SD; NS- 16.8±6.9; PS- 16.9±6.2). PET positive nodules (SUV>2.5) were larger in maximal tumor dimension than PET negative on CT though the difference was not statistically significant (mean±SD; PET Neg, n=42- 16.1±5.7; PET-pos, n=8- 20.9±8.8). Among the 39 patients in which lymph node pathology was obtained, sensitivity and specificity of PET in identifying N1 disease was 0% and 92.9%; and 0% and 100% for N2 disease. Recurrence and overall survival were 0% and 100%, with median follow-up of 34 months. Figure 1
    
    
    
    Conclusion:
    The use of PET for the evaluation of SS nodules in stage I lung cancer may have limited value in detecting metastases and affecting current clinical decision making for these patients.