In my experience - I was diagnosed in 2010 - oncologists no longer routinely order these scans - PET, bone, brain, anything - unless there is evidence to suggest that the cancer has spread beyond the breast at he time of diagnosis (positive lymph nodes, etc). There may be other factors involved with the decision to order these tests that I am not familiar with. Every breast cancer - just like every patient - is different; that is why treatments vary so widely now. In my case, my tumor was 1 cm, estrogen positive and I had negative lymph nodes; therefore, I was a good candidate for the (relatively) new Oncotype DX test, which analyzes a sample of your tumor (no additional surgery is needed) and looks at certain genetic characteristics of the cancer cells. The higher the score, the more likely the cancer may recur somewhere else in the body. My score came back very low, so chemo was not recommended as it would (statistically) give me no added survival benefit. Breast cancer treatments have become far more individually targeted over the past several years. PET scans and related tests cannot tell if an early-stage cancer has (or will) spread; that is another reason why they are no longer routine.