Well here's a funny thing Arthak - Immediately after posting this question you posted two more, and in both you said you were a 12 year old boy worried, respectively, about your penis and your weight.
This forum is used by people who are genuinely dealing with this filthy, life threatening disease. Some are dying, some are going through hideous and grueling treatments in an effort to survive, some are waiting terrified for results, and some are watching their partner, parent or child die.
The cancer you have chosen to make particular fun of is a hideous disease with grueling and disfiguring treatments and no known cure. In the US alone, an average of 112 women a day die from it - that's one every fifteen minutes.
So bored kiddies pretending to have cancer are not welcome here - go play somewhere else.
In case someone reading your question is worried by your crap: breast cancer, like all other cancers, happens when normal cells change so that they grow in an uncontrolled way. This uncontrolled growth causes a tumour to form.
No hands, writing implements or any other external thing can trigger this process.
I HAVE had breast cancer