A chemical found in hard plastics -- such as CD cases, baby bottles, food-storage containers, and even electronics parts -- has been loosely linked to incidences of breast cancer. Popular opinion cautions that if we were not worried about this news yesterday, we should not be worried about it today -- because studies are preliminary and nothing is definitive at this point. But there are definitely two sides to the debate over how harmful these hard plastics may be.

The chemical in question -- a pseudo-estrogen called bisphenol-A (BPA) -- appears to be absorbed by breast tumor cells, according to a new study published in the August 28 issue of Chemistry & Biology. Previous studies have linked small exposures of BPA to prostate abnormalities in mice that suggest a link between the plastic chemical and human prostate cancer. Some studies even theorize that embryonic and fetal exposure might influence mental retardation and birth defects. And because this pseudo-estrogen is a synthetic material that in human cells can trigger estrogenic effects, breast cancer now comes up as a disease that may result from this questionable chemical.

Critics say that average levels of the chemical found in urine is infinitesimally small -- about one part per billion. Some say the results of this research come from in-vitro studies that one expert says can never fully explain human disease. Yet the real crux of the matter, according to another expert, is that we are surrounded by all sorts of chemicals that are pseudo-estrogenic -- not just BPA -- and it's the cumulative effects that we do need to worry about.

I am always a bit nervous before I head out for a check-up with my oncologists. I have two of them -- a medical oncologist who delivered my chemotherapy and a radiation oncologist who delivered my radiation therapy. Today I see my radiation oncologist and she will examine my breasts and manipulate my breasts and feel my underarms and check for lymphedema -- swelling in the arm due to removed lymph nodes -- and she will ultimately determine whether or not I have anything to worry about at this time. It's been just over one year since my last radiation treatment and six months since I saw this doctor for a follow-up.

So I am a little apprehensive about what I might hear -- because it's always possible that something does not feel right, that something is questionable, that something has returned. I am mostly confident that I am okay but there is still an unknown that lies ahead of me. An unknown that in a matter of a few hours will be known. And I will either learn that I am in fact okay. Or I will begin another spiral into the what-if-it's-cancer scenario. Only time will tell.