I'm a vietnam veteran with many angent orange problems. i had a lung x-ray 6 years ago with calcified nodules now i have more nodules. could this be cancer?

Maybe/likely not.: While nodules, even calcified ones can possibly be cancer, they are more likely to be something else. Calcified nodules are likely to be associated with a chronic phase of tuberculosis that may have infected you while you were in an endemic area, like vietnam, but your immune sysytem had overcome without much symptoms or signs, but left these nodules, known as the ghon complex. Check w/ your dr.