How quickly can Dermatitis Form

I have dermatitis on my breasts and had all the affected skin removed from one of them for testing to rule out cancer.  After my scar healed, within just a few days the dermatitis or rash came back and is now worse than what it was to begin with.  If all the affected skin is removed, how quickly can the skin develop into dermatitis or a rash? I am still concerned that it is not dermatitis but rather Pagets Disease of the Nipple and that even though a biopsy was done, it was listed as a reoccuring rash and that maybe the lab did not test the sample for cancer cells.  My breasts are the only location on my body that has this rash and I have never had problems with dermatitis any where on my body.  The rash developed over a year ago and I was using a steriod cream to prevent it from forming, but if I do not use the cream every day, the rash develops very quickly.  What do you think my next step should be?

[DrNoopurMD]

Hi,

There can be many reasons for a breast rash it can either be dermatitis due to inflammation of skin due to contact with an allergen, it can be inflammatory form of breast cancer which causes inflammation and swelling of the breast and orange peal appearance of the breast, if the rash is itchy and scaly and involves a nipple it indicates pagets disease of the nipple. A recurrent breast rash should not be ignored therefore I would suggest you to schedule an appointment with your dermatologist and undergo a biopsy again.

[JustMe1234]

Thank you for responding so quickly.  I just found it odd that the rash would develop so fast after all the affected skin was removed. I will contact the doctor and express my concerns with them and see if I can get them to do another biopsy.  I read on the National Cancer website that the biopsy should be tested using a technique called immunohistochemistry to differentiate the cell types, so I am also going to tell them that this is how I want the biospsy tested.  I just want peace of mind and I honestly do not have that yet.  Thanks again for your suggestions.

JustMe1234