Which of the following statements about lung carcinoma is true
Small cell carcinoma usually occurs in central bronchi with associated mediastinal and hilar adenopathy being a common presentation at time of diagnosis Ref Harrison 19th edition pg 515
Squamous cell variant accounts for 70% of all lung cancer
Oat cell variant typically present with cavitation
Oat cell variant is typically associated with hilar adenopathy
Adenocarcinoma variant is typically central in location
Respiratory system