Luca Errico

Preoperative intrathoracic lymph node staging in patients with non-small-cell lung cancer: accuracy of integrated positron emission tomography and computed tomography

OBJECTIVE To evaluate the accuracy of integrated positron emission tomography with 18F-fluoro-2-deoxy-D-glucose (FDG) and computed tomography (PET/CT) in preoperative intrathoracic lymph node staging in patients with non-small-cell lung cancer (NSCLC) and to ascertain the role of invasive staging in verifying positron emission tomography (PET)/computed tomography (CT) results. METHODS Retrospective, single institution study of consecutive patients with suspected or pathologically proven, potentially resectable NSCLC undergoing integrated PET/CT scanning in the same PET centre. Lymph node staging was pathologically confirmed on tissue specimens obtained at mediastinoscopy and/or thoracotomy. Statistical evaluation of PET/CT results was performed on a per-patient and per-nodal-station bases. RESULTS A total of 1001 nodal stations (723 mediastinal, 148 hilar and 130 intrapulmonary) were evaluated in 159 patients. Nodes were positive for malignancy in 48 (30.2%) out of 159 patients (N1=17; N2=30; N3=1) and 71 (7.1%) out of 1001 nodal stations (N1=24; N2=46; N3=1). At univariate analysis, lymph node involvement was significantly associated (p<0.05) with the following primary tumour characteristics: increasing diameter, maximum standardised uptake value >9, central location and presence of vascular invasion. PET/CT staged the disease correctly in 128 out of 159 patients (80.5%), overstaging occurred in nine patients (5.7%) and understaging in 22 patients (13.8%). The overall sensitivity, specificity, positive and negative predictive values, and accuracy of PET/CT for detecting metastatic lymph nodes were 54.2%, 91.9%, 74.3%, 82.3% and 80.5% on a per-patient basis, and 57.7%, 98.5%, 74.5%, 96.8% and 95.6% on per-nodal-station basis. With regard to N2/N3 disease, PET/CT accuracy was 84.9% and 95.3% on a per-patient basis and on per-nodal-station basis, respectively. Referring to nodal size, PET/CT sensitivity to detect malignant involvement was 32.4% (12/37) in nodes <10mm, and 85.3% (29/34) in nodes > or = 10mm. CONCLUSION Our data show that integrated PET/CT provides high specificity but low sensitivity and accuracy in intrathoracic nodal staging of NSCLC patients and underscore the continued need for surgical staging.

CT-guided percutaneous transthoracic biopsy in the diagnosis of mediastinal masses: evaluation of 73 procedures

PurposeThis study was performed to evaluate the factors affecting the diagnostic accuracy and rate of complications of CT-guided percutaneous transthoracic needle biopsy of mediastinal masses.Materials and methodsWe reviewed 73 consecutive mediastinal biopsies in 70 patients. Final diagnoses were based on a retrospective analysis of surgical outcomes, results of repeat biopsies or findings of imaging and clinical follow-up lasting at least 4 months. Benign and malignant biopsy findings were compared with the final outcomes to determine the diagnostic accuracy of the method. Finally, we analysed the complications.ResultsCT-guided percutaneous transthoracic needle biopsy provided adequate samples in 61/73 cases, with a total sample rate of 83.6%. Of these 61 biopsies, 51 yielded a correct diagnosis with specific histological typing, mainly in the case of thymoma and metastasis. Lymphomas were less reliably diagnosed. The overall sensitivity, specificity, positive predictive value, negative predictive value and diagnostic accuracy values were 83.6%, 100%, 100%, 35.3% and 83.6%, respectively. Pneumothorax was the most common complication (5.5%).ConclusionsCT-guided percutaneous transthoracic needle biopsy is an easy, reliable and safe procedure that obviates the need for exploratory surgery in medically treatable or unresectable cases. It should be the first invasive procedure in the diagnostic workup of mediastinal masses.RiassuntoObiettivoValutare i fattori che influenzano l’accuratezza diagnostica ed il tasso di complicanze dell’agobiopsia transtoracica percutanea TC-guidata di lesioni espansive mediastiniche.Materiali e metodiSono state considerate 73 procedure bioptiche mediastiniche consecutive su 70 pazienti. La diagnosi finale deriva dall’analisi dei risultati della chirurgia, di un’eventuale successiva agobiopsia transtoracica o dall’esito del follow-up clinico/radiologico pari ad un periodo non inferiore a 4 mesi. I riscontri bioptici con esito benigno e maligno sono stati confrontati con la diagnosi finale, ricavando l’accuratezza diagnostica della metodica. È stata quindi condotta un’analisi delle complicanze.RisultatiL’agobiopsia percutanea trastoracica sotto guida TC ha fornito materiale adeguato in 61/73 casi, offrendo un tasso di campionamento complessivo del 83,6%. Di queste 61 procedure, 51 hanno stabilito la diagnosi corretta con specificità di istotipo, principalmente nei casi di timoma e di lesioni metastatiche. Il gruppo dei linfomi ha riscontro diagnostico meno affidabile. I valori globali di sensibilità, specificità, valore predittivo positivo, valore predittivo negativo e accuratezza diagnostica sono risultati pari a 83,6%, 100%, 100%, 35,3%, e 83,6% rispettivamente. Lo pneumotorace ha rappresentato la complicanza più comune (5,5%).ConclusioniL’agobiopsia percutanea trastoracica sotto guida TC rappresenta procedura semplice, affidabile e sicura, evitando il ricorso ad un accertamento esplorativo chirurgico nei casi passibili di trattamento medico o non resecabili. Dovrebbe costituire il primo accertamento invasivo nella gestione diagnostica di una formazione espansiva mediastinica.

Accuracy of CT-guided transthoracic needle biopsy of lung lesions: Factors affecting diagnostic yield

PurposeThis study was performed to analyse the variables affecting the diagnostic accuracy of computed tomography (CT)-guided transthoracic needle biopsy of pulmonary lesions.Materials and methodsA retrospective study of 612 consecutive procedures with confirmed final diagnoses was undertaken. Benign and malignant needle biopsy results were compared with final outcomes to determine diagnostic accuracy. A statistical analysis of factors related to patient characteristics, lung lesions and biopsy technique was performed to determine possible influences on diagnostic yield. A p value less than 0.05 was interpreted as statistically significant.ResultsThere were 508 (83%) malignant and 104 (17%) benign lesions. Sensitivity, specificity, positive predictive value, negative predictive value and accuracy for a diagnosis of malignancy were 90.2%, 99.0%, 99.8%, 67.3% and 91.7%, respectively. Overall diagnostic accuracy was 83.3%. Variables affecting diagnostic accuracy were the final diagnosis (benign 67%, malignant 92%; p<0.001) and lesion size (lesions<1.5 cm 68%, lesions 1.5–5.0 cm 87%, lesions>5 cm 78%; p<0.05).ConclusionsIn CT-guided transthoracic needle biopsy, the final diagnosis and lesion size affect diagnostic accuracy: benign lung lesions and lesions smaller than 1.5 cm or larger than 5.0 cm in diameter provide lower diagnostic yield.RiassuntoObiettivoValutare i fattori che influenzano l’accuratezza diagnostica dell’agobiopsia transtoracica percutanea TC-guidata di lesioni polmonari.Materiali e metodiSono state considerate retrospettivamente 612 procedure bioptiche consecutive per le quali è risultata disponibile la diagnosi definitiva. I reperti bioptici benigni e maligni sono stati confrontati con la diagnosi finale, ricavando l’accuratezza diagnostica della metodica. È stata quindi condotta un’analisi statistica relativamente a variabili proprie del paziente, della lesione e della tecnica bioptica per determinare possibili influenze sui valori di accuratezza. I dati ottenuti sono stati considerati statisticamente significativi per valori di p<0,05.RisultatiCinquecentootto lesioni (83%) sono risultate, alla diagnosi finale, maligne, mentre 104 (17%) benigne. I valori di sensibilità, specificità, valore predittivo positivo, valore predittivo negativo ed accuratezza, riferiti ad una diagnosi di malignità, sono risultati rispettivamente del 90,2%, 99,0%, 99,8%, 67,3% e 91,7%. L’accuratezza diagnostica globale della procedura è stata dell’83,3%. Le variabili che hanno influenzato significativamente i livelli di accuratezza sono risultate la diagnosi finale (espansi benigni 67%, maligni 92%; p<0,001) ed il diametro medio della lesione (lesioni<1,5 cm 68%, tra 1,5 e 5,0 cm 87%, >5 cm 78%; p<0,005).ConclusioniLa diagnosi finale (benignità versus malignità) e le dimensioni della lesione influenzano l’accuratezza diagnostica della metodica: addensamenti polmonari di natura benigna e lesioni con diametro <1,5 cm o >5 cm sono caratterizzati da livelli minori di accuratezza diagnostica.

The Prognostic Significance of Maximum Standardized Uptake Value of Primary Tumor in Surgically Treated Non–Small-Cell Lung Cancer Patients: Analysis of 413 Cases

BACKGROUND Integrated PET/CT is widely used in the preoperative staging and prognostic assessment of non-small-cell lung cancer (NSCLC) patients. The aims of this study were to evaluate the prognostic significance of SUVmax of primary tumor in patients undergoing surgical treatment and, in order to minimize technical interferences, to verify whether SUVmax standardized by SUVmax liver or SUVmax blood pool provided additional prognostic information. PATIENTS AND METHODS A retrospective study of 413 consecutive NSCLC patients undergoing potentially curative surgical resection after PET/CT obtained in the same PET center over a 6-year period. The SUVmax was calculated drawing region of interest around the primitive tumor, the liver, and the aortic arch in PET images. The same procedure was performed for 2 adjacent planes and the average of these measures was considered. RESULTS Nine patients were considered 30-day postoperative deaths and were excluded from the analysis. At the end of the study, 312 (77.2%) of the 404 patients were alive (median follow-up, 26 months) and 92 had died (median survival, 17 months). At multivariate analysis tumor-node-metastasis stage, primary tumor grading and primary tumor SUVmax (T-SUVmax) were found to be independent prognostic factors, while T-SUVmax/SUVmax blood pool ratio, and T-SUVmax/SUVmax liver ratio were not. CONCLUSIONS T-SUVmax is an independent predictor for survival in NSCLC patients undergoing surgery and might be helpful in guiding adjuvant treatment strategies. SUVmax of primary tumor normalized by SUV blood pool or SUV liver does not provide additional prognostic information.

Air leaks following pulmonary resection for malignancy: risk factors, qualitative and quantitative analysis

Air leaks are a common complication of pulmonary resection. The aims of this study were to analyze risk factors for postoperative air leak and to evaluate the role of air leak measurement in identifying patients at increased risk for cardiorespiratory morbidity and prolonged air leak. From March to December 2009, 142 consecutive patients underwent pulmonary resection for malignancy and were prospectively followed up. Preoperative and intraoperative risk factors for air leak were evaluated. Air leaks were qualitatively and quantitatively labeled twice daily. There were 52 (36.6%) patients who had an air leak on day 1, and 32 (22.5%) who had an air leak on day 2. Air leak was ≥180 ml/min in 12 (37.5%) of these patients. Independent predictors of air leak on day 2 included type of pulmonary resection, presence of adhesions, and incomplete fissures. Cardiorespiratory morbidity was significantly higher (34.4%) in patients who experienced air leak on day 2 than in those who did not (10.9%) (P=0.002). Nine (75%) out of 12 patients with air leak ≥180 ml/min on day 2 had prolonged air leak (greater than five days) (P=0.0001).

Exploring Stage I non-small-cell lung cancer: development of a prognostic model predicting 5-year survival after surgical resection †

OBJECTIVES Despite impressive results in diagnosis and treatment of non-small-cell lung cancer (NSCLC), more than 30% of patients with Stage I NSCLC die within 5 years after surgical treatment. Identification of prognostic factors to select patients with a poor prognosis and development of tailored treatment strategies are then advisable. The aim of our study was to design a model able to define prognosis in patients with Stage I NSCLC, submitted to surgery with curative intent. METHODS A retrospective analysis of two surgical registries was performed. Predictors of survival were investigated using the Cox model with shared frailty (accounting for the within-centre correlation). Candidate predictors were: age, gender, smoking habit, morbidity, previous malignancy, Eastern Cooperative Oncology Group performance status, clinical N stage, maximum standardized uptake value (SUV(max)), forced expiratory volume in 1 s, carbon monoxide lung diffusion capacity (DLCO), extent of surgical resection, systematic lymphadenectomy, vascular invasion, pathological T stage, histology and histological grading. The final model included predictors with P < 0.20, after a backward selection. Missing data in evaluated predictors were multiple-imputed and combined estimates were obtained from 10 imputed data sets. RESULTS Analysis was performed on 848 consecutive patients. The median follow-up was 48 months. Two hundred and nine patients died (25%), with a 5-year overall survival (OS) rate of 74%. The final Cox model demonstrated that mortality was significantly associated with age, male sex, presence of cardiac comorbidities, DLCO (%), SUV(max), systematic nodal dissection, presence of microscopic vascular invasion, pTNM stage and histological grading. The final model showed a fair discrimination ability (C-statistic = 0.69): the calibration of the model indicated a good agreement between observed and predicted survival. CONCLUSIONS We designed an effective prognostic model based on clinical, pathological and surgical covariates. Our preliminary results need to be refined and validated in a larger patient population, in order to provide an easy-to-use prognostic tool for Stage I NSCLC patients.

A suitable system of reconstruction with titanium rib prosthesis after chest wall resection for Ewing sarcoma

The recent improvements in chemotherapy and surgical resection in Ewing sarcoma (ES) increased the overall survival as well as the importance of chest wall reconstruction. These improvements are in order to avoid asymmetrical growth, functional and cosmetic compromise after surgery. Chest wall reconstruction still remains a big issue in young patients with ES. We present a case of ES of the left chest wall, arising from a rib, in a 14-year-old patient. He was admitted after neoadjuvant chemotherapy and radiotherapy. The patient underwent a chest wall resection of three ribs and a wedge lung resection of the upper lobe followed by chest wall reconstruction with Stratos™ rib titanium prostheses. This new device is suitable for reconstruction after major chest wall resection with good cosmetic and functional results. During the follow-up, there was no evidence of local and distant recurrence, the pain was under control and there were no functional alterations in the chest wall.

Evaluation of integrated positron emission tomography and computed tomography accuracy in detecting lymph node metastasis in patients with adenocarcinoma vs squamous cell carcinoma

OBJECTIVES The aim of our study was to analyze the specificity and sensitivity of integrated positron emission tomography and computed tomography (PET/CT) in detecting nodal metastasis according to histology (adenocarcinoma vs squamous cell carcinoma), and to identify the factors related to false-negative findings. METHODS A retrospective, single-institution review of 353 consecutive patients with suspected or pathologically proven, potentially resectable non-small-cell lung cancer (NSCLC) who had integrated PET/CT scanning at the same centre. Lymph node staging was pathologically confirmed on tissue specimens obtained at mediastinoscopy and/or thoracotomy. Statistical evaluation of PET/CT results was performed on a per-patient and per-nodal-station basis. RESULTS A total of 2286 nodal stations (1643 mediastinal, 333 hilar and 310 intrapulmonary) were evaluated. Adenocarcinoma was the final diagnosis in 244 patients and squamous carcinoma in 109 patients. Nodes were positive for malignancy in 80 (32.8%) of 244 patients with adenocarcinoma (N1 = 31; N2 = 48 and N3 = 1) and in 32 (29.3%) of 109 with squamous carcinoma (N1 = 21 and N2 = 11). PET/CT in the adenocarcinoma group had a sensitivity, specificity and accuracy of 53.8, 91.5 and 79.1%, and in the squamous cell group, of 87.5, 81.8 and 83.5%, respectively in a per-patient analysis. In the analysis for N2 disease on a per-patient basis, the sensitivity, specificity and accuracy were 38.8, 97.4, and 85.7% for the adenocarcinoma group and 81.8, 91.8 and 90.8% in the squamous cell group. In the adenocarcinoma group, the mean diameter of false-negative lymph nodes was 7 mm (standard deviation [SD] ± 2.5 mm) compared with the diameter of true-positive lymph nodes of 12.5 (SD ± 4 mm; P < 0.00001). In the squamous cell group, the mean diameter of false-negative lymph nodes was 7.4 mm (SD ± 2.8 mm) compared with the diameter of true-positive lymph nodes of 14.7 (SD ± 6 mm; P < 0.005). In the adenocarcinoma group, false-negative lymph nodes were statistically correlated with the presence of vascular invasion and in the squamous cell group only with the maximum standardized uptake value (SUV(max)) < 5.4. CONCLUSIONS The sensitivity of PET/CT in detecting nodal metastasis in patients with adenocarcinoma is too low to avoid any further invasive staging procedure. Ultrasound-guided needle biopsy or mediastinoscopy is still necessary in staging patients undergoing lung resection for adenocarcinoma.

C2-02: Factors effecting risk of pneumothorax (PNX) in CT-guided transthoracic needle biopsy of lung lesions: results of 708 consecutive procedures

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Suitable device for thoracoscopic talc poudrage in malignant pleural effusion

Chemical pleurodesis is widely used in symptomatic patients with malignant pleural effusion to relieve symptoms, prevent fluid recurrence, and improve quality of life. Talc has been repeatedly found to be the most effective sclerosant agent, and thoracoscopic talc poudrage has been found to be the most effective pleurodesis technique. A homogeneous talc distribution on the visceral and parietal pleura helps to achieve complete pleural symphysis. We have recently adopted a new suitable sterile device that delivers talc under low and constant pressure, facilitating uniform coating of the whole pleural surface and avoiding inappropriate deposition of talc clumps.