carcinoma of lung & esophagus radiology - aroi.orgaroi.org/icro_pdf/7th icro aiims new delhi/dr...
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Carcinoma of Lung & EsophagusRadiology
Dr Sanjay ThulkarAssociate Professor of Radiology
Dr BRA IRCH, AIIMS
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Lung Cancer: Imaging Modalities
� Primary� Chest x-ray PA view� CT
� Occasionally required� MRI� USG� Radionuclide scan, PET
� Image guide biopsy
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Imaging Features of Lung Cancer
� Central tumour
� Peripheral tumour
� Atypical findings
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Lung Cancer: Typical
� Central mass � Peripheral mass
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Lung Cancer: Atypical
� Non resolving/ atypical pneumonia
� Collapse
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Lung Cancer: Atypical
� Pleural effusion � Pleural thickening
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Lung Cancer: Atypical
� Lymphadenopathy � Atypical cavity
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Lung Cancer: Atypical
� Mucoid impaction
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Squamous Cell Ca: Radiology
� Central mass� With bronchial
narrowing
� Lobar collapse
� Solitary pulmonary nodule
� Cavity
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Central Mass
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Central Mass With Collapse
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Collapse, no mass on imaging
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Cavity
� Eccentric
� Thick wall� >8 mm
� >15 mm diagnostic
� Shaggy margin
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Adenocarcinoma
� Peripheral mass
� Incidental discovery in asymptomatic
� Large and with metastases when symptomatic
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Adenocarcinoma
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Adenocarcinoma
� Invade pleura and cause puckering
� Later gross pleural spread with encasement of the lung may occur
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Broncho-Alveolar Cell Carcinoma
� Slow growing
� Solitary pulmonary nodule� Most common
� Pneumonic pattern
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BAC: SPN
� Usually subpleural� Solid
� Ground glass
� Pleural tail/ tethering
� Patent bronchi/ vessels within nodule� Air bronchogram/ CT
angiogram sign
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BAC: Pneumonic pattern
� Alveolar filling of tumor without invasion
� Nodular consolidation with air bronchogram
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Pancoast/ Superior Sulcus Tumor
� Any histology
� Arise near/at apical pleura and grows into� Chest wall - chest/ shoulder pain
� Neck
� Stellate ganglian –Horner’s syndrome
� Brachial plexus – plexopathy
� Invasion of spine, brachia plexus, subclavian vessels - unresectable
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Pancoast Tumor
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Carcinoid
� <5 % of all lung cancers
� Low malignant potential, good prognosis
� Majority are central
� Lobar/ segmental bronchi
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Carcinoid
� Air trapping � Collapse
� Mucoid impaction
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Carcinoid (vs Carcinoma)
� CT� Usually difficult
� Very high contrast enhancement
� Calcification
� Somatostatin Receptor Scintigraphy (SRS) � Most sensitive and accurate investigation
� PET with 11C-5HTT
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Small Cell Lung Cancer
� Most aggressive lung cancer
� Spreads to vessels and LNs without bronchial invasion
� 90% have extrathoracic disease at presentation
� Bone marrow involvement, brain metastases
� Considered a systemic disease
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Small Cell Lung Cancer: Imaging
� Hilar and mediastinal lymphadenopathy, often bilateral and extensive
� LN pathy may obscure central primary lesion
� SPN – do not cavitate
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SCLC
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Lung Cancer: Screening
� Low dose helical CT� Many randomised and non-randomized projects in
USA, Europe and Japan
� Benefits not proved
� Present consensus (American Cancer Society, American College of Radiology)� Primary prevention (ban on smoking) is more effective
than secondary prevention (screening)
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Staging of NSCLC
� Tumor� Size, location, margin & adjacent structures
� Lymph nodes� Involvement & location
� Distant metastases� Present/ absent
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T1
� Size less than 3 cm
� Surrounded by lung parenchyma only
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T2
� > 3cm
� Invasion of visceral pleura
� > 2 cm from carina
� Small collapse/ consolidation of affected lobe
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T3
� Invasion of pleura, pericardium, chest wall, diaphragm
� < 2 cm from carina (carina is free)
� Collapse/consolidation of entire lobe
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T3
� Chest wall � Pericardium/ pleura
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T3
� <2cm from carina � Consolidation/ collapse of entire lobe
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T4
� Invasion of mediastinum� Heart, great vessels� Esophagus� Vertebra� Trachea/carina
� Malignant pleural/ pericardial effusion
� Satellite nodule in same lobe
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N Staging
� CT sensitivity & specificity ~ 65%
� Mediastinoscopy is the gold standard� Controversial
� Some surgeons do in all
� Some in N2 disease only
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M Staging
� Type of lung cancer� SCLC > adeno ca > sq cell ca
� Sites (at presentation)� Adrenal (20%)� Brain (18%)� Bone (13%)� Liver� Extra thoracic LNs
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M- Staging
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PET in Lung Cancer Staging
� Excellent for N and M staging� Changes management in up to 40% patients
� Not useful for T staging� Size < 5mm
� BAL ca (false –ve in 40%)
� Brain metastases
� Inflammation, diabetes
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PET: N Staging
� Sensitivity 90%
� Specificity 94%
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Staging of Small Cell Lung Cancer� Only two stages
� Whether the disease can be included in single RT field
� Limited disease (LD)� Ipsilateral lung/ pleural disease, ipsi/ contra lateral LN
� Extensive disease (ED)� Contralteral lung/ pleural disease
� Any extrathoracic disease
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Carcinoma of Esophagus
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Ca Esophagus
� Endoscopy and biopsy� Mainstay of diagnosis
� Imaging� Barium swallow
� CT
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Ca Esophagus
� Upper third� Up to aortic arch
� Mid third� Up to inferior pulmonary vein
� Lower third� Below that
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Ca Esophagus: Pathology
� Squamous cell carcinoma� 50% mid esophagus, rest upper and lower
� Adenocarcinoma� 90% around GE junction
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Ca Esophagus: Barium Swallow
� Infiltrative
� Ulcerative
� Polypoid
� Mixed
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Ca Esophagus: Barium Swallow
� Early� Small polyp/ ulcer� Mucosal plaque
� Advanced� Luminal narrowing� Mucosal irregularity� Ulceration� Shouldering
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Ca Esophagus: Mucosal irregularity
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Ca Esophagus: Strictures
Benign Malignant
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Ca Esophagus: Strictures
� Abrupt
� Eccentric
� Shouldering
� Mucosal irregularity
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Ca Esophagus: Polypoid
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Ca Esophagus: CT
� Staging work-up� Invasion of adjacent structures
� Lymph node enlargement (mediastinal/RP)
� Metastases
� Technique� CECT of Chest and upper abdomen
� Oral and IV contrast
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Ca Esophagus: CT
� Aortic invasion� Uncommon
� Loss of fat plane –especially fatty triangle
� Angle of contact� <45 degree: free
� >90 degree: highly suspicious
� Rest: indeterminate
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Ca Esophagus: CT
Tracheo-bronchial invasion� Early signs
� Convex bulge in lumen of trachea/ bronchi
� Not useful in cervical trachea
� Loss of fat plane
� Specific but late signs� Luminal extension of tumor� Fistula formation
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Ca Esophagus: CT
� Lymph node metastases
� Enlargement� Mediastinum/ RP >10 mm
� Retrocrural, Supraclavicular > 6mm
� Central necrosis
� High false positive and negatives on CT
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Ca Esophagus: Metastases
� Liver
� Lung
� Adrenal
� Peritoneum
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Ca Esophagus: Liver Metastases
� Hypodense, hypovascular
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Ca Esophagus: Endoscopic ultrasound
� More suitable for T staging� All layers can be indentified
� Depth of mural penetration (T stage) assessed with accuracy of 90%
� Accurate assessment of periesophageal lymph nodes
� Not suitable for distant lymph nodes or metastases
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Ca Esophagus: Recurrence
� Local
� Nodal
� Metastatic
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Thank You