Most common primary bronchogenic carcinoma is
Histological type . Frequency Adenocarcinoma . 32% Squamous cell carcinoma . 29% Small cell carcinoma . 18% Large cell carcinoma. 9% Carcinoid. 1% Ref Harrison 19th edition pg 2584
Small cell carcinoma
Squamous cell carcinoma
Mixed cell carcinoma
Adenocarcinoma
Respiratory system