hi can you tell me what tests are available for testing or screening a nipple for Pagets or Eczema?

There is no discharge at all , and no flaking or scaling.

The nipple is just red, enlarged and cracked. (plus sore and itchy- but i am not scratching, I did once which might have made it swell but that was over 2 weeks ago)

2 doctors said nothing can be done at this stage, and I am waiting for scans and stuff with a breast specialist in 4 weeks but want into on how to confirm it's eczema before then, which is what I was told and don't believe. I mean, I am not going to lay back and accept a guess. I want it confirmed but was told it's not possible, only by looking.

someone please help me. I have googled loads but it all seems too invasive at this stage. Is it not possible to get some cells from the surface of the nipple to examine under a microscope ???