Lung cancer

Q) A 73 year male,  old heavy smoker presents with haemoptysis. On examination he is cachectic and shows evidence of clubbing. Imaging shows a main bronchial tumour with massive mediastinal lymphadenopathy together with widespread visceral metastases. Which of the following variant is likely in him? ( Theme from mock test 12- 24) 

a)  Adenocarcinoma
B.  Small cell lung cancer
C. Large cell lung cancer
D. Squamous cell carcinoma

Ans  b

 Small cell lung cancer
Small cell carcinoma is associated with disseminated disease at presentation in the majority of cases. Most cases occur in the main airways and paraneoplastic features are common

Adenocarcinomas are the most common tumour type present in never smokers. They are usually located at the periphery.

Squamous cell carcinomas are reported to be more slow growing and are typically centrally located