A 70-year-old man has smoked for years despite a chronic productive cough. One day, he notices blood in his sputum and goes to see his physician. A chest x-ray reveals a mass in the left lung, which is biopsied during a fiberoptic bronchoscopy. Assuming that this patient's cancer is etiologically related to his smoking, which of the following diagnoses are most likely to be returned by the pathology laboratory?
Adenocarcinoma or bronchioloalveolar carcinoma Adenocarcinoma or small cell carcinoma Bronchioloalveolar carcinoma or small cell carcinoma Small cell carcinoma or squamous cell carcinoma