DCIS after ADH? ER/PR status?

If whatever showed up on the first MRI disappeared on the second MRI, it was probably a false positive brought on by fluctuations in your hormones during your menstrual cycle.  Don't worry about it. 

The only reason ER and PR would be important, as I see it, is if you were willing to take Tamoxifen to reduce your recurrence risk.  I think you should discuss those probabilities with your surgeon and/or an oncologist.

I'd guess it would probably take a few more days to get the ER PR status after the preliminary path report from the biopsy comes in. 

I might be misunderstanding your post, but it seems like you're concerned about whether you have ADH or DCIS or both.  I'd want second opinions on the slides until I was confident that there was some agreement regarding what disease/diseases I was dealing with. 

No one really wants to do rads or Tamox.  Don't try to make a firm decision until after the definitive surgery when you know exactly what your situation is.  Right now, you're still in the information gathering stage.

If it will make you feel more confident, have another institution take a look at your slides.  

Do whatever you need to do so that you're comfortable with the decisions you'll have to make. 

Don't worry about the time.  If you wanted to, I'm sure you could re-schedule the partial mastectomy.  Yes, if it's DCIS you should treat it - and while you should discuss this with your Dr to be sure - I seriously doubt there would be a medical problem delaying a few more weeks, or month, to make a decision you were comfortable with. 

Or as comfortable as you're ever gonna get, anyway. 

I just wanted to add that ADH and DCIS can be very similar looking, DCIS being at a slightly more advanced stage.  Pathologists can disagree on which category they consider the specimen.

I'd get as many opinions as you need to feel confident about which you have, or whether you have both, and what it all means, treatment wise.

I have no strong opinion one way or the other on Lagios, but if you don't choose him I do strongly suggest you have your slides looked at by a pathologist at one of the major NCI designated cancer centers.  Are you being treated at one of the cancer centers now?  You definitely want someone who sees a LOT of breast cancer slides to look at yours.  And you may want more than one second opinion from more than one additional institution.

It seems like this might be a judgment call between whether you have Grade 1 DCIS  (sort of like DCIS lite) or ADH.  What exactly the differences in treatment recommendations would be, I'm not sure.

I had Grade 3 DCIS, and although several institutions looked at my slides while I was surgeon shopping, there was never a question about what my slides meant - everyone agreed on that much!   I have to say that while the surgeons disagreed about what kind of surgery was best, at least knowing that there was consensus about my slides gave me some amount of peace of mind.