Conversation: The conversation between human and AI assistant.
[|Human|] hello doctor for the last 6 days ive been dealing with a coughing problem at first i thought it was just an asthma attack .. which i usually deal with a inhaler or if it get worse a nebulizer ... ive been coughing rusty green sputum, feeling tired and weak, dizzy, headache, and pain in my chest area .... i wanted to check if it was lung cancer since my family has a history with cancer ... so can lung cancer be detected by blood test? if so what tyoe of blood test is needed
[|AI|]  Thanks for your question on Chat Doctor. I can understand your situation and problem. By your history and description, possibility of lung Infection (pneumonia) is more. Lung infection is common in asthma patients due to poor lung defense. And cough, greenish phlegm, weakness, dizziness etc. are common symptoms of pneumonia. So better to get done chest x-ray first. Chest x-ray will also be helpful in screening of lung cancer. No blood tests are available for diagnosis of lung cancer. Non-specific tumor markers like CEA, LDH, CA125 etc. are raised in lung cancer. But these are non-specific and hence diagnosis can not be made on their values. Screening of lung cancer is done by chest x-ray. And fir confirmation, CT thorax and biopsy are required. But at present, you need chest x-ray to rule out pneumonia. Hope I have solved your query. Wish you good health. Thanks.