My older sister has come to live with me due to several health issues. I would like to know if anyone agrees with me that she has possible lung cancer. Her symptons are: She has smoked since 10yrs old, she has lost 30 lbs in less than 9 months, she has started a loose cough, Always tired, feeling numbness is a leg. We went to get a ct scan with contrast and they were unable to get a vein. Will try again. Please advise.