6. Pathology
• Primary
• Sq. cell carcinoma
• Adenocarcinoma
• Leiyomyosarcoma
• Secondary
• Broncogenic ca
• Lung cancer
• Spread
• Local
• Nodal
• Distant
• Starts as epithelial disease
• In a closely packed space with major surrounding organs
• Lack of serosal covering means no barrier
• Dysphagia affects nutrition early
• Metastasis are not main cause of death