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Chirurgie mini-invasive : un nouveau standard en oncologie thoracique ! Gilbert Massard Service de Chirurgie Thoracique Hôpitaux Universitaires de Strasbourg

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Page 1: Chirurgie mini-invasive : un nouveau standard en oncologie ...splf.fr/wp-content/uploads/2015/11/miniinvasive-massard-r.pdf · Chirurgie mini-invasive : un nouveau standard en oncologie

Chirurgiemini-invasive:unnouveaustandardenoncologiethoracique!

GilbertMassard

ServicedeChirurgieThoracique

HôpitauxUniversitairesdeStrasbourg

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Tomothérapie

Stéréotaxie

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Caractéristiques de la chir thor mini-invasive

•  Abord par trocarts et/ou incision « utilitaire » sans écartement intercostal

•  Vision indirecte par moniteurs

•  Instrumentation dédiée

•  Dissection et ligature élective des structures hilaires

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Chirurgie par vidéothoracoscopie

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Singleport??

Pas d’avantage factuel par rapport à l’abord par 3 voies !!

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Indications potentielles

•  Stade I clinique –  TDM et TEP

–  médiastinoscopie ou EUS / EBUS préopératoire

•  Taille inférieure à 5 cm

•  Topographie périphérique (fibroscopie négative) •  Malade à risque (thoracoscore) •  Fonction pulmonaire altérée :

–  VEMS et DLCO/VA < 60% - –  ppoVEMS et ppoDLCO/VA < 40%

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Lobectomiemini-invasive:lesfaits•  Estentréedanslespra=quescourantes

•  Morbiditépost-opératoirediminuée

•  Résultatsoncologiquesiden=ques

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LalobectomieparVATSestdevenueunepra=que

courante

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STS general thoracic database

PaulSetal.JThoracCardiovascSurg2010;139:366-378

40%

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Danish Lung Cancer Registry

p ¼ 0.002) and cN0 to pN2 (11.5% vs 3.8%; p< 0.001).Whenanalyzing the influence of clinical T stage,we found that forclinical T1 tumors, upstaging from cN0 to pN1 was notsignificantly different (8.2% vs 8.3%; p ¼ 0.99) but that cN0to pN2 upstaging was significantly more common afterthoracotomy (7.7% vs 3.0%). For clinical T2 tumors,upstaging from cN0 to pN1 (16.9% vs 7.8%; p < 0.001) andcN0 to pN2 (14.6% vs 5.0%, p < 0.001) was more commonafter thoracotomy. When analyzing the influence of theanatomic location of the primary cancer, we found thatnodal upstaging was significantly more commonwhen theprimary cancer was located in a lower lobe (p ¼ 0.04).Upstaging occurred for cancers in the right upper lobe in15.4%,middle lobe17.6%, left upper lobe 18.1%, right lowerlobe 24.1%, and left lower lobe in 20.1%. Logistic regressionanalysis demonstrated that predictors for nodal upstagingincluded clinical T stage (p ¼ 0.01), invasive mediastinalstaging (p < 0.001), number of lymph node stationsdissected (p ¼ 0.02), surgical approach (p < 0.001), andanatomic lobe (p ¼ 0.045). Table 2 summaries the stagemigration of all 1,513 patients after the T stage wassimplified from T1a/b or T2a to T1 or T2.

The overall 30-day mortality was 2.0% and significantlyhigher after thoracotomy thanafterVATS (2.9%vs 1.1%, p¼0.02). Themedian follow-up timewas 28months (range, 0 to70 months) and was slightly but significantly longer afterthoracotomy (mean difference, 4.2 months; standard errorof difference, 0.9 months; p < 0.001). During the follow-upperiod, 441 patients (29.0%) died. Overall unadjustedsurvival by the Kaplan-Meier product limit methoddemonstrated significantly better survival after VATS thanafteropen lobectomy (p¼ 0.01), asdemonstrated inFigure2,where unadjusted survival using Cox regression is alsoshown (p ¼ 0.01). However, when overall survival wasadjusted for differences in the predicting variables using

Cox proportional hazard regression analysis, we foundthat surgical approach by VATS or thoracotomy was nolonger a significant predictor for survival (hazard ratio,0.98; 95% confidence interval, 0.80 to 1.22, p ¼ 0.88), whichis shown graphically in Figure 3. Significant predictors forsurvival by Cox regression were age, male sex, CharlsonComorbidity Index, pT stage, pN stage, which is the sameas “nodal upstaging,” and pM stage. Unadjusted andadjusted hazard ratios are reported in Table 3.

Comment

Hundreds of articles have been published on VATSlobectomy during the past 2 decades. VATS is generally

Table 1. Histopathologic Results of All Resected Tumors AfterLobectomy for Stage I Non-Small Cell Lung Cancer

Histologic ResultThoracotomy

No. (%)VATSNo. (%)

Adenocarcinoma 355 (44.6)a 390 (54.4)a

Squamous cell carcinoma 253 (31.8)a 145 (20.2)a

Adenosquamous carcinoma 6 (0.8) 8 (1.1)Mixed tumor 122 (15.3) 124 (17.3)Bronchioloalveolar carcinoma 3 (0.4) 5 (0.7)Large-cell carcinoma 37 (4.6) 23 (3.2)Sarcomatoid carcinoma 5 (0.6) 4 (0.6)Non-specified NSCLC 14 (1.8) 18 (2.5)Salivary gland-like carcinoma 1 (0.1) 0

Total 796 (52.6) 717 (47.4)

a p < 0.001 for comparison between groups for these variables; p values forall other comparisons were not significant.

NSCLC ¼ non-small cell lung cancer; VATS ¼ video-assisted thor-acoscopic surgery.

Fig 1. Lobectomy by the video assisted thor-acoscopic surgical approach (black) progres-sively increased during the study periodcompared with thoracotomy (gray). Thenumbers refer to all lobectomies for non-smallcell lung cancer, regardless of clinical stage.

945Ann Thorac Surg LICHT ET AL2013;96:943–50 NODAL UPSTAGING AFTER VATS VS THORACOTOMY

GEN

ERALTHORACIC

53%

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United Kingdom

36%

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Newtechnology:COIanddirec=onofpressure

INDUSTRY GOVERNMENT

PATIENT DOCTOR

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Epithor - France

16%

7%

22%

2013 2012 2011 2010 2009 2008 2007 2006 2005 2004

25%

2014

25%

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…etàStrasbourg?

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La VATS diminue la

morbidité post-op.

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Avantagesescomtés

Diminu=ondeparamètressuivants•  Mortalitéopératoire•  Morbiditépost-opératoire•  Duréed’hospitalisa=on•  Consomma=ond’antalgiques•  Duréed’inap=tude

Contrôledesparamètressuivants•  Coût•  Risqueoncologique

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3largesétudesdisponibles

•  Whitsonetal «systema=creview»

•  Pauletal «propensitymatched»

•  Caoetal «meta-analysis»

Whitson et al, Ann Thorac Surg 2008;86:2008-18 Paul et al, J Thorac Cardiovasc Surg 2012;139:366-78 Cao et al, Interact Cardiovasc Thorac Surg 2012;10:1-6

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Morbi-mortalité

•  Mortalitéiden=queàlachirurgieouverte•  Morbiditédiminuée!

VATS Thoracotomie pWhitson 16,4 31.2 0.018Paul 26,2 34.7 <0.0001Cao 20,2 24,9 <0.0001

Morbidité %

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Complica=onsspécifiques(%)

Thoraco VATS PRespiratoires(tot) 12.2 7.5 0.001Cardiovasc.(tot) 13.0 8.3 0.002Réintuba=on 3.1 1.4 0.004TACFA 11.5 7.2 0.0004Transfusion 4.7 2.4 0.028

Pauletal.JThoracCardiovascSurg2010;139:366-378

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Duréed’hospitalisa=on

VATS Thoracotomie pWhitson 8.3 13.3 0.016Paul 4 6 <0.0001Cao 6.3 8.8 <0.0001

Hospitalisation (jours)

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Coûtdel’opéra=on

•  Duréeopératoireaugmented’environ30min•  Coûtmatérielplusimportant

•  Gainenduréed’hospitalisa=on•  Gainenges=ondecomplica=ons

•  Bénéficenet:1000–2000$

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La VATS n’altère pas le

résultat oncologique à terme

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Méta-analyse1

studies have indicated the complication rate was reduced inVATS group versus open procedure.28

Some reasons have been explored to explain it. First, theVATS procedure was associated with reduced accesstrauma due to the minimally invasive characteristic. Somestudies have demonstrated patients underwent VATS expe-rienced much less postoperative pain and had better conser-vation of pulmonary function which was benefit forrecovery and reducing the complications.12,30,31 Secondly,minimally invasive approaches to surgery trigger less in-flammatory response. According to the literature, adecreased and shorter duration acute inflammatory stressresponse was seen in VATS.9,32 Specifically, VATS lobec-tomy is associated with reduced postoperative release ofboth proinflammatory (IL-6, IL-8) and anti-inflammatory(IL-10) cytokines compared with the open approach.33 Itmay be a reason of reduced postoperative pneumonia inci-dence in VATS.

The long-term outcomes

Overall survival is a key index for evaluating the long-term efficacy of treatment. In our meta-analysis of 5 yearsurvival rate, 8 studies were included. Among these studies,5 year survival rate was higher in VATS group in 4 studiesand had no difference in the else 4 studies, ranging from75% to 94.9%. The combined result came out that the 5year survival rate of VATS group was significant higherthan thoracotomy group.

The better survival outcome of VATS over thoracotomyfor early stage NSCLC has been identified by other re-views. Yan has reported a 5-year survival benefit of VATScompared with open lobectomy for early stage NSCLC(95% CI, 0.45e0.97, P ¼ 0.04).29 Another systematicreview has suggested the overall survival rate was signifi-cantly higher in patients treated with VATS than withopen thoracotomy at 4 years after resection (P ¼ 0.003).

Figure 3. Forest plot of meta-analysis of complication incidence and 5 year survival rate between VATS and thoracotomy lobectomy for clinical stage ⅠNSCLC.

Table 2Respective meta-analysis result of common complications.

Complication No. of studies VATS Thoracotomy OR (95% CI) P Heterogeneity

n/N n/N P I2(%)

Prolonged air leak 10 44/900 63/909 0.72(0.49e1.08) 0.11 0.96 0Atrial fibrillation 7 83/846 101/846 0.80(0.58e1.09) 0.15 0.95 0Pneumonia 7 8/459 26/518 0.43(0.20e0.93) 0.03* 0.38 6Myocardial infarction 3 2/593 4/567 0.58(0.12e2.74) 0.49 0.90 0Chylothorax 3 4/206 2/219 1.85(0.44e7.78) 0.40 0.68 0

961F.F. Chen et al. / EJSO 39 (2013) 957e963

ChenFFetal.Video-assistedthoracoscopicsurgerylobectomyversusopenlobectomyinpa=entswithclinicalstageInon-smallcelllungcancer:Ameta-analysis.EJSO2013;39:957-963

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Méta-analyse2

TaioliEetal.Long-termsurvivalinvideo-assistedthoracoscopiclobectomyvsopenlobectomyinlung-cancerpa=ents:ameta-analysis.EurJCardio-ThoracSurg2013;44:591–597

determined by performing Begg funnel plots and the Egger’sbias test [49].

Stratified analyses were performed according to the geograph-ical area of origin of the study (Asia, USA/Europe).

RESULTS

Published papers included 2106 patients who underwent VATSand 2661 patients who underwent thoracotomy (Table 1). Thesize of the studies ranged from 21[40] to 515 patients [38]. Allstudies but two [45, 50] reported on early-stage NSCLC. Allstudies were observational and retrospective in nature. The as-signment to one surgical treatment or the other was made onthe basis of clinical judgment.

Five-year survival ranged from 62 to 97% for VATS and from58 to 97% for thoracotomy. The summary estimates for 5-yearsurvival are presented in Fig. 1. There was an advantage in5-year mortality for patients who underwent VATS vs patientswho underwent thoracotomy (meta difference in survival: 5%;95% CI: 3–6%) with large heterogeneity among studies (Q = 42.6;P-value: 0.001; I2 = 55.7%). There was no evidence of publicationbias (Fig. 2).

Data were stratified according to the geographical area wherethe study was conducted (Table 2). Average difference in survivalbetween lung-cancer patients who underwent VATS and thosewho underwent thoracotomy was large in studies conducted inAsia in comparison with studies conducted in the USA/Europe(5.5 vs 0.5%). However, a large heterogeneity was observedamong Asian studies. Three studies conducted in the USA/

Europe reported follow-ups between 30 and 40 months [43, 51–53]. When those studies were excluded, the difference in 5-yearmortality between VATS studies and thoracotomy studies con-ducted in western countries was 3.2%. No heterogeneity wasobserved in the US/European studies.

DISCUSSION

Our meta-analysis suggests that VATS lobectomy is an acceptablealternative to open thoracotomy. The short-term benefits of theVATS approach have been previously documented in the

Figure 1: Meta-analysis of studies comparing VATS to thoracotomy. Q = 42.6 (0.001); I2 = 55.7%.

Figure 2: Funnel plots of studies comparing VATS to thoracotomy.

E. Taioli et al. / European Journal of Cardio-Thoracic Surgery594

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Lobectomiemini-invasive:lesques=ons •  Quiddesrésec=onsinfralobaires?

•  Quidducurageganglionaire?

•  Quiddelarobo=que

•  Peut-onpousserlesindica=ons?

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Résections infralobaires :

Oui pour T < 2 cm

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Pourquoifairedesrésec=onsinfra-lobaires

•  Pa=entsàhautrisque:– Réduiremorbi-mortalité

•  Pe=testumeurspériphériques:

– Economiserdelafonc=onrespiratoire

– Économiserduparenchyme(risquedeCametachrone)

•  Carcinomeinsituouàfaiblerisqueévolu=f

– Lefuturgrâceaux«screeningprogram»?

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Influencedelatailledelatumeursurlasurvie:rôledelasegmentectomie

Taille lobectomie segmentectomie wedge

<2cm 92.2% 96.7% 85.7%

2-3cm 87.4% 84.6% 39.4%

>3cm 81.3% 62.9% 0

OkadaMetal,JThoracCardiovascSurg2005;129:87-93

Survieà5ans

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resection due to an inferior OS rate and a higher recurrence ratethan for lobectomy [2]. Since then, studies comparing the effect ofsublobar resection and lobectomy have been limited to retro-spective reviews with a small sample size [7, 19, 20, 22]. Advancesin minimally invasive surgical techniques, critical care and imaginghave caused the issue of sublobar resection, especially segmen-tectomy, to remerge [24]. The poor prognosis associated with sub-lobar resection may be due to the use of non-anatomical wedgeresection, which does not allow efficient dissection of the pul-monary hilar lymph nodes, whereas anatomical segmentectomydoes allow the dissection of these nodes and may be suitable forcandidates with small-sized NSCLC. Furthermore, the accuratelymph node staging data available with segmentectomy but notwith wedge resection are important for postoperative treatment.

Recently, thoracic surgeons have focused on the evaluation ofsegmentectomy and lobectomy for patients with small-sizedNSCLC, with both encouraging and discouraging outcomesreported (Table 1). Meta-analyses reported by Nakamura et al.[33] and Fan et al. [34] compared sublobar resection and lobec-tomy. Nakamura combined differences in survival (survival ratewith lobectomy minus that with limited resection) at 1, 3 and 5years after resection and found no significant differences in sur-vival, suggesting that survival after sublobar resection for Stage Ilung cancer is comparable with that after lobectomy [33].However, their report was based on data published about 10years ago and much additional data have been published in

recent years. Fan et al. conducted a meta-analysis to compare theoutcomes of segmentectomy with lobectomy for stage I NSCLCpatients based on eight published studies, the results showed seg-mentectomy produced an outcome similar to that with lobec-tomy [34]; nonetheless, their findings are limited, with many moredata reported in recent years. Moreover, these two meta-analysesdo not compare segmentectomy with lobectomy using stratifieddata based on different tumour sizes [33, 34], and it is necessary toconduct a more stratified meta-analysis comparing segmentect-omy and lobectomy that is based on updated data.Meta-analysis is often used in randomized clinical trials (RCTs),

but the application of meta-analysis to observational studies iscontroversial [35]. However, when no RCTs are available, as is the

Figure 2: Overall survival/cancer-specific survival estimates for segmentectomy compared with lobectomy for Stage I NSCLC. Seg: segmentectomy; Lob: lobectomy.

Table 2: Summary of comparison results

Series Survival Comparison of survival Egger’s test

HR 95% CI P-value Bias P-value

I OS/CSS 1.20 1.04–1.38 0.011 0.12 0.770IA OS/CSS 1.24 1.08–1.42 0.002 −0.41 0.265IA (2–3 cm) OS/CSS 1.41 1.14–1.71 0.001 0.35 0.678IA (≤2 cm) OS/CSS 1.05 0.89–1.24 0.550 −0.15 0.802

F. Bao et al. / European Journal of Cardio-Thoracic Surgery4

« Segmentectomy provides survival inferior to that following lobectomy for Stage I NSCLC patients, Stage IA patients and Stage IA patients with tumours larger than 2 cm but smaller than 3 cm »

BaoF,etal.EurJCardio-ThoracSurg2014;46:1-7.

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Recommanda=onsrésec=onsinfralobaires

recommandaBon niveau grade

Silalobectomieesttoléréefonc=onnellement,laRILdoitêtreévitée

Ib A

Sihautrisque,laRILpeutdonnerunpronos=csimilaire III B

Segmentectomie>wedge III B

Taille:segmentectomie<2cm;lobectomie>2cm III B

Age:wedge>71ans;lobectomie<71ans III B

Margederésec=onwedgeetsegmentectomie:>1cm III B

RILsanscurageacceptablepouradénoCainsitu III B

R.Rami-Porta*andM.Tsuboi.EurRespirJ2009;33:426–435

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Le curage reste

d’actualité !

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DarlingGetal.JThoracCardiovascSurg2011;141:662-70

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Larecommenda=onclassique:est-elled’actualitédanslecT1N0?

•  Améliora=ondesou=ls:PET-CT

•  Histologiesmoinsagressives

•  ACOSOG

•  Curage scissural et hilaire identique en VATS •  Curage médiastinal plus compliqué ?

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PET-:valeurprédic=venéga=ve!

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DarlingGEetal.Randomizedtrialofmedias=nallymphnodesamplingversuscompletelymphadenectomyduringpulmonaryresec=oninthepa=entwithN0orN1(lessthanhilar)non–smallcellcarcinoma:ResultsoftheAmericanCollegeofSurgeryOncologyGroupZ0030Trial.JThoracCardiovascSurg2011;141:662-670

p=0.90

ACOSOGZ0030Echantillonnage ganglionnaire

N2 et N1 hilaire ont été éliminés au préalable !

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Basesdedonnées

Osarogiagbon RU et al. Ann Thorac Surg 2014; 97:385-93

SEER Database 1998-2009

variables, unadjusted Kaplan-Meier method for visuali-zation of survival curves, and the log-rank test to comparesurvival curves. The Cox proportional hazards modelwas used to determine the effect of the number oflymph nodes on overall survival, adjusted for patientsociodemographic factors, tumor characteristics, andtreatment, including the extent of surgical resection. Weused the Fine and Gray competing risk model to examinelung cancer–specific survival [17]. The threshold of thenumber of lymph nodes was determined by examiningthe trend of hazard ratios in the multivariate analysis.The critical turning point in the hazard ratio curve wasthe optimal number of lymph nodes. We set p to lessthan 0.001 in the threshold analysis of the number oflymph nodes examined and survival based on theBonferroni adjustment for multiple comparisons. The pvalue for significance in all other analyses, not involvingmultiple testing, was < 0.01.

We performed sensitivity analyses in the thresholdanalysis by grouping lymph nodes using various lymphnode number brackets and by directly modeling thenumber of lymph nodes with both linear and quadraticterms. We also performed additional analyses to eval-uate the consistency of our findings, including analysiswith and without patients who received postoperativeadjuvant radiation therapy, given its potentially dele-terious implications for survival in resected early-stageNSCLC; the impact of a postoperative mortalityexclusion window of 30 versus 60 days; examination ofthe lobectomy subcohort; separate analyses for eachT category; and finally, the trend in number of lymphnodes examined per patient with pN0 tumors overthe 12-year time span of resections included in thisstudy.

Results

Cohort Characteristics and the Distribution of LymphNode CountsFrom 1998 to 2009, the SEER database had 24,650 patientseligible for inclusion in our analysis cohort (Fig 1). Thedistribution of the number of lymph nodes examinedreveals a tendency to examine relatively few lymphnodes (Fig 2). The median number of lymph nodesexamined was 6. There were significant differences indemographic and clinical characteristics betweenpatients with 6 or more and those with less than 6 lymphnodes examined (Table 1). The extent of resection wasstrongly associated with lymph node counts. Althoughonly 28% of patients who had a wedge or segmentalresection had 6 or more lymph nodes examined, 60% oflobectomy and 79% of pneumonectomy recipients did.

Impact of Lymph Node Counts on SurvivalThe overall 5-year survival rate of the cohort was 58.6%(95% confidence interval [CI], 57.8%–59.3%). For patientswith less than 6 lymph nodes examined, the 5-year sur-vival rate was 55% (95% CI, 53.9%–56.2%), and for thosewith 6 or more lymph nodes examined, it was 61.4% (95%CI, 60.4%–62.3%). The hazard ratio for mortalitydecreased sequentially with increasing number of lymphnodes examined until a maximal benefit was achievedwith examination of 20 nodes (Fig 3). After examination of20 lymph nodes, the sequential improvement in thehazard ratio for death was no longer evident. Thispattern was consistent for all-cause and lung cancer-–specific mortality (Figs 3A, 3B). In the threshold analysis,a minimum of 6 lymph nodes was required to show asignificant reduction in mortality risk over examination

Fig 2. Distribution of number of lymphnodes examined in patients with resectedpathologic node-negative non–small cell lungcancer (NSCLC): US Surveillance, Epidemi-ology and End Results database, 1998to 2009.

3Ann Thorac Surg OSAROGIAGBON ET AL2013;-:-–- NUMBER OF NODES IN NODE-NEGATIVE LUNG CANCER

of only 1 lymph node for both all-cause and lungcancer–specific mortality (p < 0.001).

In the multivariate model, which adjusted for allrelevant demographic and clinical factors (including theextent of resection), the number of lymph nodes exam-ined was a strong independent predictor of mortalityrisk, which sequentially diminished with increasingnumber of lymph nodes examined until the 18 to 21lymph node subset, after which the hazard ratio roseslightly (Table 2). Other factors—including sex, maritalstatus, residence in a metropolitan area, tumor grade,tumor size, tumor location, T category, and extent ofresection—were also independently associated withmortality.

Sensitivity Analyses of the Relationship Between LymphNode Count and SurvivalThe pattern of the relationship between lymph nodecount and survival was not affected by inclusion orexclusion of patients who received postoperative adju-vant radiation therapy or inclusion or exclusion of pa-tients who died within 30 or 60 days of operation (datanot shown). The pattern was also consistent within eachpathologic T category (data not shown). In the lobec-tomy subcohort, the pattern of improvement in survivalup to the 18 to 20 lymph node count remained,although with wider confidence intervals resulting froma smaller sample size (Fig 4). Over the span of 12 yearsfrom 1998 to 2009, there was a modest trend toward

Fig 3. Evolution of hazard ratio for mortalitywith the number of lymph nodes examined.(A) All-cause mortality. (B) Lung cancer–specific mortality. (CI ¼ confidence interval.)

5Ann Thorac Surg OSAROGIAGBON ET AL2013;-:-–- NUMBER OF NODES IN NODE-NEGATIVE LUNG CANCER

which we proposed as the optimal number required toaccurately determine the absence of nodal metastasis.

Patients and Methods

Study DesignWith the permission of the University of Tennessee Insti-tutional Review Board, we conducted a retrospective anal-ysis of the US Surveillance, Epidemiology, and End Results(SEER) database of patients treated for NSCLC from 1998 to2009, with survival updated to December 31, 2009.

The SEER DatabaseSEER is designed to be representative of the US popu-lation, with patient-level data abstracted from 18 specificgeographically diverse populations representing rural,urban, and regional populations. During the time spanincluded in this study, the SEER data collection sitesincluded up to 28% of the US population [16].

Patient SelectionEligible patients had initial treatment for a first pri-mary NSCLC in the SEER database from 1998 to 2009.

We eliminated patients with bronchioloalveolar car-cinoma, small-cell lung cancer, and benign neuroen-docrine tumors because nodal status is not asimpactful on the prognosis and treatment of thesepatients. We also eliminated those who did not un-dergo surgical resection, as well as recipients of ra-diation therapy, patients with lymph node or distantmetastasis, those who did not have nodal examina-tion, and all patients who died within 60 days ofoperation (Fig 1).

Outcomes and DataOur primary objective was to determine the number ofexamined lymph nodes associated with the lowest risk ofdeath within 5 years after curative operation for pN0NSCLC. We also examined the distribution of the num-ber of lymph nodes examined per patient and the char-acteristics associated with higher numbers of lymphnodes examined.

Statistical AnalysisWe used the c2 test to compare differences between cat-egorical variables, the t test and trend test for continuous

EXCLUDEDFig 1. Selection of study cohort.

2 OSAROGIAGBON ET AL Ann Thorac SurgNUMBER OF NODES IN NODE-NEGATIVE LUNG CANCER 2013;-:-–-

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TagakiHetal.JThoracCardiovascSurg2011;142:477-8

Echantillonnage ganglionnaire

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La robotique

augmente le coût

sans valeur ajoutée

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Robot-Assisted Thoracic Surgery

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Quid de l’extension

des indications ?

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Champsd’inves=ga=on!

•  Chirurgieaprèschimiod’induc=on

•  Exérèsesélargiesàlaparoi

•  Lobectomieavecbroncho-ouangioplas=e

•  Thymomes<5cm

•  Pathologiesbénignes

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Exérèsesmini-invasivesenoncologie:Queconclure??

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Uneévolu=ondespra=quesestencours

•  Avantagesimmédiatsdelachirurgiemini-invasive•  Résultatoncologiqueàtermesimilaire•  Placedesrésec=onsinfra-lobaires:T1aN0•  Curageindispensable

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et/oudefaibleagressivité

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Exérèse(infra)lobaireparVATS:solu=ondechoixfaceauxdifférentes«ablathérapies»

•  Résec=onrespectantlesprincipesoncologiques•  Cer=tudedel’abla=oncomplète•  Histologieexhaus=ve

– Tumeur– Environnementganglionnaire

•  Risqueacceptable

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Manythankstomyteam!!