D. Trousse

Respiratory complications after oesophagectomy for cancer do not affect disease-free survival

OBJECTIVESnRecent studies have suggested that postoperative complications could have a potential negative effect on long-term outcome after oesophagectomy for cancer. Because respiratory failures represent the most frequent postoperative complication, we have investigated the prognostic impact of these complications on disease-free survival (DFS).nnnMETHODSnFrom a prospective single-institution database of 405 consecutive patients who underwent transthoracic oesophagectomy for cancer, we retrospectively analysed medical charts of all patients with microscopically complete resection (R0, n = 384 patients). Complications were graded according to the modified Clavien classification. Respiratory complications were defined as atelectasis, pneumonia or acute respiratory distress syndrome in the absence of early surgical complications. Patients with grade 5 (postoperative mortality, n = 43, 11%) were excluded from the analysis. The remaining 341 patients were analysed for estimation of DFS according to the Kaplan-Meier method. Logistic regression analysis was conducted to discriminate predictive factors affecting DFS.nnnRESULTSnAccording to the modified Clavien classification, postoperative complications rates were grade 0: 147 (44%), grade 1: 7 (2%), grade 2: 56 (16%), grade 3: 69 (20%) and grade 4: 62 (18%). Five-year DFS rates were not significantly different between grade 0 (no complication, 38%, n = 147) and other grades (grade 1, 2, 3 and 4 (64, 45, 56 and 48%, respectively)). Respiratory complications occurred in 107 patients (31%) and the 5-year DFS in this subgroup was 47% compared with 38% observed in grade 0 patients (P = 0.75). Clavien classification and respiratory complications did not come out in the univariate analysis of factors affecting DFS. On logistic regression, only two variables affected DFS: c-N stage and extracapular lymph node involvement.nnnCONCLUSIONSnWhen postoperative mortality is excluded, postoperative complications do not affect DFS in patients with complete resection. This deserves substantial information regarding the prognosis of subgroup of patients in critical situations where incrementing intensive care is debated.

Body mass index kinetics and risk factors of malnutrition one year after radical oesophagectomy for cancer

OBJECTIVEnMalnutrition is common after oesophageal cancer surgery. This study aims to investigate body mass index (BMI) kinetics and the risk factors of malnutrition among 1-year disease-free survivors after radical transthoracic oesophagectomy for cancer.nnnMETHODSnFrom a prospective single-institution database, 118 1-year disease-free survivors having undergone a R0 transthoracic oesophagectomy with gastric tubulization between 2000 and 2008 were identified retrospectively. BMI values were collected at the onset of the disease (pre-treatment BMI), at the time of surgery (preoperative BMI), at postoperative 6 months and 1 year after oesophagectomy (1-year BMI). Logistic regression was performed with adjustment for confounders to estimate odds ratios of the factors associated with a 1-year weight loss (WL) of at least 15% of the pre-treatment body weight (BW).nnnRESULTSnAt the onset of the disease, 5 patients (4%) were underweighted (BMI < 8.5 kg/m²), 65 (55%) were normal (BMI = 18.5-24.9 kg/m²), 36 (31%) were overweighted (BMI > 25 kg/m²) and 12 (10%) were obese (BMI > 30 kg/m²). Mean pre-treatment, preoperative, postoperative 6-month and 1-year BMI values were 24.64 ± 4 kg/m², 23.55 ± 3.8 kg/m², 21.7 ± 3 kg/m² and 21.97 ± 4 kg/m², respectively. One-year WL ≥ 15% of the pre-treatment BW was present in 29 patients (25%): 18 among the 48 patients (37%) with a pre-treatment BMI ≥ 25 and 11 among the 70 patients (15%) with pre-treatment BMI < 25 (P = 0.006). On logistic regression, initial overweighting was the sole independent prognosticator of 1-year postoperative WL of at least 15% of the pre-treatment BW (P = 0.039; OR: 2.96, [1.06-8.32]).nnnCONCLUSIONSnPostoperative malnutrition remains a severe problem after oesophageal cancer resection, even in long-term disease-free survivors. Overweight and obese patients are the segment population most exposed to this postoperative malnutrition, suggesting that such surgery could have substantial bariatric effect. A special vigilance programme on the nutritional status of this sub-group of patients should be the rule.

Complications respiratoires de l’œsophagectomie pour cancer

La chirurgie d’exerese, basee sur l’œsophagectomie avec curage ganglionnaire, reste le traitement de reference des cancers de l’œsophage juges comme extirpables. Les progres des techniques chirurgicales et de la reanimation ont permis de reduire nettement la mortalite operatoire de cette intervention (5 a 10xa0%). Parmi les causes de deces postoperatoire, les complications respiratoires post-œsophagectomie (CRPO) arrivent au premier rang. Ces CRPO concernent plus de 30xa0% des patients et surviennent dans 80xa0% des cas au cours des cinq premiers jours. Ces CRPO sont representees par l’encombrement bronchique, la pneumopathie nosocomiale et le syndrome de detresse respiratoire aigue (SDRA). Ces complications sont proches de celles observees en chirurgie pulmonaire. Leurs mecanismes et leur prevention ne different donc pas de celles observees en cas d’exerese pulmonaire. De nombreuses etudes se sont attachees a comprendre les mecanismes physiopathologiques de ces CRPO. Cependant, il existe un important probleme de definition et l’analyse de leur incidence par comparaison aux etudes existantes est difficile. Ces complications respiratoires sont multifactorielles. Il existe des facteurs preoperatoires lies aux patients et a leurs comorbidites, des facteurs peroperatoires lies a l’acte chirurgical et a la gestion de l’anesthesie, et des facteurs postoperatoires dependant de la prise en charge en reanimation. La comprehension des mecanismes impliques dans la genese de ces complications, leur prise en charge precoce par une gestion standardisee, permettraient de reduire leur incidence et donc la mortalite hospitaliere. Le but de cette mise au point est de decrire, a la lumiere des acquisitions recentes de la litterature, les differents phenomenes participant a la survenue de ces complications et de proposer des strategies pour reduire leur incidence.

High-emergency waiting list for lung transplantation: early results of a nation-based study.

OBJECTIVESnThe high mortality rate observed on the regular waiting list (RWL) before lung transplantation (LTx) prompted the French organ transplantation authorities to set up in 2007 a dedicated graft allocation strategy, the so-called high-emergency waiting list (HEWL), for patients with an abrupt worsening of their respiratory function. This study reports on the early results of this new allocation system.nnnMETHODSnAmong 11 active French LTx programmes, 7 were able to provide full outcome data by 31 December 2011. The medical records of 101 patients who were listed on the HEWL from July 2007 to December 2011 were reviewed for an intention-to-treat analysis.nnnRESULTSnNinety-five patients received LTx within a median waiting time on the HEWL of 4 days (range 1-26), and 6 died before transplantation. Conditions were cystic fibrosis (65.2%), pulmonary fibrosis (24.8%), emphysema (5%) and miscellaneous (5%). The median age of the recipient was 30 years (range 16-66). Patients listed on the HEWL came from the RWL in 48.5% of the cases and were new patients in 51.5%. Forty-nine were placed under invasive ventilation and, in 26 cases, extracorporeal membrane oxygenation (ECMO) prior to transplantation was necessary as a complementary treatment. ECMO for non-intubated patients was performed in 6 cases. Eighty-one bilateral and 14 single LTx were performed, with an overall in-hospital mortality rate of 29.4%. One- and 3-year survival rates were 67.5 and 59%, respectively. Multivariate analysis shows that the use of ECMO prior to transplantation was the sole independent mortality risk factor (hazard ratio = 2.77 [95% CI 1.26-6.11]).nnnCONCLUSIONSnThe new allocation system aimed at lowering mortality on the RWL, but also offered an access to LTx for new patients with end-stage respiratory failure. The HEWL increased the likelihood of mortality after LTx, but permitted acceptable mid-term survival rates. The high mortality associated with the use of ECMO should be interpreted cautiously.

Adenocarcinoma of the esophagus and esophagogastric junction in patients older than 70 years: Results of neoadjuvant radiochemotherapy followed by transthoracic esophagectomy

AIMnThe standard treatment of locally-advanced esophageal adenocarcinoma consists of neoadjuvant radiochemotherapy followed by surgical resection. Very little data are available concerning the feasibility of this strategy in patients older than 70 years of age.nnnPATIENTS AND METHODSnBetween 1996 and 2008, 118 patients underwent transthoracic esophagectomy with lymphadenectomy for adenocarcinoma of the esophagus and gastric cardia (Siewert I and II). These were divided into three groups for comparison: Group I (age less than 70 years, neoadjuvant treatment followed by surgery; n=66); Group II (age greater or equal to 70 years, surgery alone; n=32); Group III (age greater or equal to 70 years, neoadjuvant treatment followed by surgery; n=20). Data concerning comorbidities, type of intervention, morbidity, mortality, survival and quality of life were analyzed.nnnRESULTSnThere was no difference among the three groups with regard to comorbidity and preoperative evaluation. The patients in Groups I and III had more locally-advanced tumors (P<0.001). There was some disparity between the types of surgery proposed. The Lewis-Santy esophagectomy was most commonly used (90%, 50%, and 65% respectively). The 90-day mortality was 8%, 15%, and 15% respectively. There was no statistically significant difference in the incidence of postoperative pulmonary, cardiac, or digestive complications among the three groups. No difference was found in 5-year survival and quality of life.nnnCONCLUSIONSnNeoadjuvant radiochemotherapy for elderly patients (age above 70 years) with esophageal adenocarcinoma did not seem to increase postoperative morbidity or mortality, nor was there any difference in quality of life, nor any effect on survival, no matter what the age of the patient.

Molecular Detection of Microorganisms in Distal Airways of Patients Undergoing Lung Cancer Surgery

BACKGROUNDnWhereas proximal airways of patients undergoing lung cancer surgery are known to present specific microbiota incriminated in the occurrence of postoperative respiratory complications, little attention has been paid to distal airways and lung parenchyma considered to be free from bacteria. We have hypothesized that molecular culture-independent techniques applied to distal airways should allow identification of uncultured bacteria, virus, or emerging pathogens and predict the occurrence of postoperative respiratory complications.nnnMETHODSnMicrobiological assessments were obtained from the distal airways of resected lung specimens from a prospective cohort of patients undergoing major lung resections for cancer. Microorganisms were detected using real-time polymerase chain reaction (PCR) assays targeting the bacterial 16s ribosomal RNA gene and Herpesviridae, cytomegalovirus (CMV), and herpesvirus simplex. All postoperative microbiological assessments were compared with the PCR results.nnnRESULTSnIn all, 240 samples from 87 patients were investigated. Colonizing agents were exclusively Herpesviridae (CMV, n=13, and herpesvirus simplex, n=1). All 16s ribosomal RNA PCR remained negative. Thirteen patients (15%) had a positive CMV PCR (positive-PCR group), whereas the remaining 74 patients constituted the negative-PCR group. Postoperative pneumonia occurred in 24% of the negative-PCR group and in 69% of the positive-PCR group (p=0.003). Upon stepwise logistic regression, performance status, percent of predicted diffusion lung capacity for carbon monoxide, and positive PCR were the risk factors of postoperative respiratory complications. The CMV PCR had a positive predictive value of 0.70 in prediction of respiratory complications.nnnCONCLUSIONSnWhen tested by molecular techniques, lung parenchyma and distal airways are free of bacteria, but CMV was found in a high proportion of the samples. Molecular CMV detection in distal airways should be seen as a reliable marker to identify patients at risk for postoperative respiratory complications.

Oropharyngeal and nasopharyngeal decontamination with chlorhexidine gluconate in lung cancer surgery: a randomized clinical trial

PurposeRespiratory complications are the leading causes of morbidity and mortality after lung cancer surgery. We hypothesized that oropharyngeal and nasopharyngeal decontamination with chlorhexidine gluconate (CHG) would be an effective method to reduce these complications as reported in cardiac surgery.MethodsIn this multicenter parallel-group randomized double-blind placebo-controlled trial, we enrolled consecutive adults scheduled for anatomical pulmonary resection for lung cancer. Perioperative decontamination consisted in oropharyngeal rinse solution (0.12% CHG) and nasopharyngeal soap (4% CHG) or a placebo. The primary outcome measure was the proportion of patients requiring postoperativexa0invasive and/or noninvasive mechanical ventilation (MV). Secondary outcome measures included occurrence of respiratory and non-respiratory healthcare-associated infections (HAIs) and outcomes within 90 days.ResultsBetween July 2012 and April 2015, 474 patients were randomized. Of them, 24 had their surgical procedure cancelled or withdrew consent. The remaining 450 patients were included in a modified intention-to-treat analysis: 226 were allocated to CHG and 224 to the placebo. Proportions of patients requiring postoperative MV were not significantly different [CHG 14.2%; placebo 15.2%; relative risks (RRs) 0.93; 95% confidence interval (CI) 0.59–1.45; Pu2009=u20090.76]. Neither of the proportions of patients with respiratory HAIs were different (CHG 13.7%; placebo 12.9%; RRs 1.06; 95% CI 0.66–1.69; Pu2009=u20090.81). The CHG group had significantly decreased incidence of bacteremia, surgical-site infection and overall Staphylococcus aureus infections. However, there were no significant between-group differences for hospital stay length, change in tracheal microbiota, postoperative antibiotic utilization and outcomes by day 90.ConclusionsCHG decontamination decreased neither MV requirements nor respiratory infections after lung cancer surgery. Additionally, CHG did not change tracheal microbiota or postoperative antibiotic utilization.Trial RegistrationThis study is registered on ClinicalTrials.gov, number NCT01613365.

Rapid Diagnosis of Lung Tumors, a Feasability Study Using Maldi-Tof Mass Spectrometry

Objective Despite recent advances in imaging and core or endoscopic biopsies, a percentage of patients have a major lung resection without diagnosis. We aimed to assess the feasibility of a rapid tissue preparation/analysis to discriminate cancerous from non-cancerous lung tissue. Methods Fresh sample preparations were analyzed with the Microflex LTTM MALDI-TOF analyzer. Each main reference spectra (MSP) was consecutively included in a database. After definitive pathological diagnosis, each MSP was labeled as either cancerous or non-cancerous (normal, inflammatory, infectious nodules). A strategy was constructed based on the number of concordant responses of a mass spectrometry scoring algorithm. A 3-step evaluation included an internal and blind validation of a preliminary database (n = 182 reference spectra from the 100 first patients), followed by validation on a whole cohort database (n = 300 reference spectra from 159 patients). Diagnostic performance indicators were calculated. Results 127 cancerous and 173 non-cancerous samples (144 peripheral biopsies and 29 inflammatory or infectious lesions) were processed within 30 minutes after biopsy sampling. At the most discriminatory level, the samples were correctly classified with a sensitivity, specificity and global accuracy of 92.1%, 97.1% and 95%, respectively. Conclusions The feasibility of rapid MALDI-TOF analysis, coupled with a very simple lung preparation procedure, appears promising and should be tested in several surgical settings where rapid on-site evaluation of abnormal tissue is required. In the operating room, it appears promising in case of tumors with an uncertain preoperative diagnosis and should be tested as a complementary approach to frozen-biopsy analysis.

Long-term outcome of open versus hybrid minimally invasive Ivor Lewis oesophagectomy: a propensity score matched study†

OBJECTIVES: It has been suggested that laparoscopic Ivor Lewis (IL) oesophagectomy reduces postoperative morbidity and mortality rates. However, data related to the long-term outcomes of this hybrid minimally invasive procedure are scarce. METHODS: All of the patients who had an IL oesophagectomy for cancer were extracted from a prospective database. Patients were matched one to one according to the surgical approach (laparoscopy versus laparotomy) and on the basis of a propensity score including eight variables: age, gender, American Society of Anaesthesiologists score, forced expiratory volume in 1 s, surgery (first-line treatment, after neoadjuvant treatment and salvage surgery), histology, location and pathological stage. The first end point was the assessment of the 5-year survival and disease-free survival rates. The secondary end points were R0 resection rate, number of resected lymph nodes (LNs) and patterns of recurrence. RESULTS: Over a 12-year period, 272 IL oesophagectomies were performed. A total of 140 patients were matched in two homogeneous groups: laparotomy (n = 70) and laparoscopy (n = 70). The 5-year overall survival and disease-free survival rates were 65% and 48% in laparotomy group and 73% and 51% in the laparoscopy group (P = 0.891; P = 0.912). R0 resection rates were, respectively, 93% vs 97% (P = 0.441). The number and distribution of resected LNs were similar between the groups except at the level of the celiac axis (P < 0.001). Depending on the surgical approach, the patterns of recurrence were similar in both groups. CONCLUSIONS: Laparoscopic IL oesophagectomy does not compromise the long-term oncological outcome compared to open IL oesophagectomy. The quality of the operations is similar for both techniques except for the number of resected LNs at the level of the celiac trunk. Further randomized controlled trials are necessary to confirm these results.

Stratégie chirurgicale : quelles nouvelles techniques ? La chirurgie minimalement invasive (RATS/VATS). Les exérèses d’épargne parenchymateuse. Les parcours de soin accélérés

Resume La chirurgie thoracique a beneficie de nombreuses innovations techniques au cours des dernieres decennies. En parallele les programmes de depistage permettent de diagnostiquer des cancers bronchiques primitifs a des stades plus precoces. Les pratiques chirurgicales se sont donc modifiees d’une part par la generalisation des voies mini-invasives, d’autre part par l’apparition des resections anatomiques infralobaires (segmentectomies) que l’on pourraient qualifier de « chirurgie de precision » qui apparaissent comme des alternatives valables a la lobectomie dans des situations definies, et enfin par la mise en place de parcours de soins acceleres et personnalises, parfois meme ambulatoires. L’objet de cette revue, sera de detailler ces aspects modernes de la chirurgie thoracique au travers de ces trois points, intrinsequement lies les uns aux autres.