If yous is 7mm it is not very big. Mine is 5.7 CM which is 2.5", if yours is mm, it is very small. He told me that cancer is usually more dense, or the mass is usually dense and he said this was not very dense, he also said that the lymph nodes around it were normal, no swelling but I aslo have some smaller nodules close by to the bigger mass which could be satellite densities. It's all very terrifying!! The rest of my lung feilds were clear. Sometimes living in cold climates we can get these smaller nodules that are just from brochitis or past lung infections and they mean nothing. If yours is only 7MM that is not big at all!! Let me know how things go with you with your scan too!!! I am very nervous, but who wouldnt' be?!