I'm 33 year old non-smoker and yet I have a lung nodule that is 7mm located in my lower right lung. I just found out about this a month ago after a CT. Doctors (pulminologist) say that they are not too worried about it because I'm so young. However, I do have mantle cell lymphoma in my family. My Dad and Uncle have had it and my uncle is still fighting it for his 3rd time. My dad is doing great now for 8 years. A 2nd uncle died of pancreatic cancer at age 35 after fighting it for about 3 years. Because of this the Dr. scheduled me for a recheck CT in May to see if the nodule changed. He said that if it ever were to get to be 1cm he would want me to do the PET scan. Doing research now about nodules and trying to figure out if that is the right plan or if I should have other tests done. Thank you for taking the time to read this and I look forward to any advise. :) Tina