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P1.06 - Poster Session 1 - Prognostic and Predictive Biomarkers (ID 161)
- Event: WCLC 2013
- Type: Poster Session
- Track: Biology
- Presentations: 1
- Coordinates: 10/28/2013, 09:30 - 16:30, Exhibit Hall, Ground Level
P1.06-048 - An extensive analysis on T1aN0 non-small cell lung cancer: from surgery to pathology. (ID 2881)
09:30 - 16:30 | Author(s): P. Bertoglio
Unfortunately, non-small cell lung cancers are often diagnosed at an advanced stage. Early stage, and particularly T1aN0 NSCLCs, still represent a small percentage of all lung cancers at the moment of diagnosis. Research on early stage lung cancer may lead to discover new molecular insights which, hopefully, will reflect on new treatment opportunities: in particular, MicroRNAs (miRNAs) play a key role in cancer pathogenesis. We retrospectively reviewed our recent experience on surgically resected T1aN0 non small cell lung cancers, focusing on their surgical, histological, and molecular characteristic.
From 2000 to 2010 we operated 114 T1aN0 non small cell lung cancers (81 male and 33 female). Most of them (90; 78,94%) underwent a lobectomy, 11 (9,65%) a segmental resection and in 13 cases (11,40%) a wedge resection; systematic lymphadenectomy was always performed. Operation was performed in 104 (91,23%) cases by thoracotomy (either posterolateral or lateral), 3 (2,63%) by VATS surgery and in 7 (6,14%) cases by robot assisted technique. All specimens were reviewed by two pathologists: 48 (42,10%) were invasive adenocarcinoma, 14 (12,28%) in situ/minimally invasive adenocarcinoma, 51 (44,74%) squamous cell carcinoma and 1 (0,88%) anaplastic carcinoma. Furthermore we evaluated Let-7g, miR-21 and miR-205 expression and their prognostic and predictive value.
With a mean follow-up of 67 months, the 5-year overall survival is 75,00%. Recurrence occurred in 25 cases (21,93%), with a average disease-free interval of 26 months: 7 cases had a local recurrence, while 18 patients had distant metastasis. No correlation between survival, the kind of intervention performed, histology and cancer grading was found. Furthermore, maximum diameter of cancer do not affect survival. In average 8 ± 5,5 (range 3-28) lymphnodes were resected in 3 ± 1,3 stations (range 2-7): neither numbers of lymphnodes resected nor number of stations examined affect survival. All MicroRNAs considered were compared to the pathological and clinical variables.
T1N0 non small cell lung cancer have a good survival with a low recurrence rate. In our experience histology, grading and the kind of resection (wedge resection and segmentectomy vs lobectomy) do not seem to influence recurrence rate and the prognosis. MicroRNAs tools have a good potential role as prognostic and predictive factors in lung cancer.