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Lung Cancer Non-Small Cell Staging/Prognosis/Treatment. Oncology Teaching October 14, 2005 Lorenzo E Ferri . Lung Cancer. Highest cancer death rate for men and women. Canadian Cancer Statistics 2004. Lung Cancer – Pathology. Non-Small Cell Squamous Cell Carcinoma Adenocarcinoma BAC
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Lung CancerNon-Small CellStaging/Prognosis/Treatment Oncology Teaching October 14, 2005 Lorenzo E Ferri
Lung Cancer Highest cancer death rate for men and women
Lung Cancer – Pathology • Non-Small Cell • Squamous Cell Carcinoma • Adenocarcinoma • BAC • Large Cell • Small Cell • Neuroendocrine (Carcinoid, Large cell NE, small)
Staging • Staging should provide prognosis and dictate management • TNM Classification universally accepted
T status – T1 • 3 cm or less, completely covered by pleura, does not involve main bronchus
T Status – T2 • > 3cm • Visceral pleura • Main bronchus but > 2cm from carina • Atelectasis but not complete lung
T status – T3 • Chest wall • Diapragm • Mediastinal pleura • Pericardium • Main bronchus <2cm to carina • Complete atelectasis
T Status – T4 • Carina • Vertebrae • Great Vessel • Esophagus • Heart • Separate tumour nodule in same lobe • MALIGNANT pleural effusion
N Status • N0 – no regional LN metastases • N1 – LN mets in ipsilateral peribronchial and/or intrapulmonary • N2 – ipsilateral mediastinal or subcarinal • N3 – contralat mediastinal or supraclavicular nodes
M Status • Common distant sites sites include • Brain, bone, liver, adrenal • Two nodules in same lung
Stage I • 1A – T1 N0 • 1B – T2 N0
Stage IIA • T1 N1
Stage IIB • T2 N1 • T3 N0
Stage IIIA • T1-3 N2 • T3 N1
Stage IIIB • T0-3 N3 • T4 N0-3
IA IB IIA IIB IIIA IIIB IV 60-75% 50-60% 50-60% 40-50% 15-30% 5-10% 0-5% 5 Year Survival • Overall 5 year survival = 15% (no change in 3 decades) Mountain 1997, Rami-Porta 2000, Naruke 1988
Survival Survival by Pathologic Stage Survival by Clinical Stage MD Anderson 1975-1988
Is all Stage IIIA (N2) the same? • Single vs multiple station • Bulky vs non-bulky • Station 5/6 in LUL cancer • Nodal vs extra-nodal disease
Staging Investigations – non invasive • History and Physical! –hoarseness (T3 or N2) supraclavicular nodes (N3) • CXR – Size (rough), chest wall (T3), effusion (T4) • CT Chest/upper Abdo • T status – accurate • N status (>1 cm= 70% +, <1cm=7% +) • M status – adrenal, liver, lung, bone
Staging Investigations – non invasive • MR – for T4 and M1 • thorax – not routine – for Pancoast • Brain – asymptomatic patients have brain mets in less than 3% Hillers et al Thorax 1994 • Bone Scan – asymptomatic patients have mets in less than 5%
PET/CT • Technology is evolving • Allows for “one step” extrathoracic staging • Independent predictor for survival (low SUV) • What about mediastinum? • NPP must be very high if invasive staging is to be avoided • NPP=98% in a recent study (Pozo-Rodriguez JSO 2005) Not good for BAC, small lesions <0.5 cm
PET/CT Does this need pathologic confirmation?
Invasive StagingBronchial, Mediastinal and Pleural • Bronchial Bronchoscopy – for proximal lesions (T3 vs T4) • Pleural • Throracentesis – 60-65% accurate • Pleuroscopy and biopsy – more than 95%
Post-obstructive effusion Are all effusions associated with known lung cancer malignant?
Mediastinal Staging - Invasive • CT and PET/CT – better but not perfect for mediastinal nodes • Mediastinoscopy is the gold standard! • Assesses N2 and N3
What is really needed? • Do we need to invasively assess N2 disease in everyone? • Small peripheral lesion (esp SCC and BAC) have a low rate of mediastinal mets (1 cm=10%, 3 cm =25%) • CT/PET accuracy is improving • TBNA and EUS often obviate the need for M-scope Institution specific – U of T – everyone gets a M-scope McGill and rest of N.A. - selective
Treatment • Stage IA – Lobectomy (VATS vs Thoracotomy) • Stage IB-IIB - Lobectomy + adjuvant Cx • Pancoast (T3N1) – neoadjuvant chemorads (EP 2cycles with 45 Gy) • Stage IIIA – • T3N1 (resected) – adjuvant Cx • N2 disease ??? • Traditionally a non-surgical disease BUT….. • Neoadjuvant (Int 0139) - no Difference, but 27% vs 20% 5-yr survival - Albain et al ASCO 2005
Treatment • Stage IIIB – definitive CxTx, BUT…. • Not all T4s are equal • T4N0-1 – aorta, vertebra, all other major vessels have been resected with reasonable 5 year survival (20-30%) Rendina JTCVS 1999
Treatment • Stage IV • Palliative – median survival approx 6 months • Malignant effusion – if symptomatic • Thoracentesis • if no improvement think lymphangetic spread, PE, etc • If symptomatically improved • if lung expands Pleurodesis • If lung trapped pleural drainage (tenkhoff vs repeated taps)