6 years with rash on 1 breast I did a biopsy it should nothing. Could it be cancer or Paget's disease?

Breast rash. I am glad that the biopsy was normal. Biopsy is the most definitive answer. Here is more info on Paget's Disease of the breast: http://www.mayoclinic.org/diseases-conditions/pagets-disease-of-the-breast/home/ovc-20198014. Gaining more knowledge can be reassuring. Take care.