This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Unknown
Which Lung Cancer has poor prognosis - 
Select and explain. 
A. Small cell lung Cancer, B. Squamous Cell CA, C. Large cell CA, D. All of the above
A: Small cell lung Cancer
Answer: A: Small cell lung Cancer 
Explanation: Ans. is 'a' i.e., Small cell lung Cancer o Small cell carcinomas are the most aggressive of lung tumors, metastasize widely and are virtually incurable by surgical means. Hence has poor prognosis among various Lung cancers o 60% of small cell cancers present late o People with extensive-stage SCLC have an average five-year survival rate of less than 1%.