question: Thank you .... I am stage 4 breast cancer to the bone.  I have been doing chemo therapy for the past 4 months.  Over the past few weeks I have noticed a white rubbery subtance in my tool, and a significant amount.  My stomache usually hurts badly before I have a BM.  Is this something I should be concerned about, or is this the chemo, or even cancer cells exiting my body?  Thank you.