Most common primary bronchogenic carcinoma is: (A) Small cell carcinoma, (B) Squamous cell carcinoma, (C) Mixed cell carcinoma, (D) Adenocarcinoma
Answer is D. 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