LCIS on 1st year

Hi, last year in Mar25 I was diagnosed with a DCIS, I have dense (c) breasts.  In Apr25 I had a lumpectomy and then 2 weeks of radiation.  My 1st year review was Mar26 and now I have been diagnosed with an LCIS - pleomorphic.  My concern is that the 1st report says L high-grade DCIS - HR immunohistochemistry is in progress a supplementary report will follow - that says Oestrogen receptor (ER) strong nuclear express in 60% of cells, PR is -negative <1% - however, assessment is hampered by the limited extent of the intraductal proliferation. E-cadherin immunohistochemistry pathology is underway to confirm a ductal phenotype, a supplementary report will follow.

On the following report conclusion is LB, stereotactic biopsis, stromal microcalcifications and focal in situ carcinoma, features favour plemorphic lobular carcinoma LCIS over DCIS

My surgeon advised if it was the DCIS he would be recommending mastectomy but as it is LCIS then lumpectomy (same as last year) but no radiation.

I have since had an MRI so we can be more conclusive but my concern is the rate at which I have had a LCIS pleomorphic grow.  I am considering a second opinion, has anyone else been in this situation. 

I am 62years old and other than the above I am generally healthy.  I am seriously considering a mastectomy given my dense breast, what if something is missed, I don't want to keep doing this each year.

After reading many of your journeys I appreciate that I am possibly one of the lucky ones but at the moment very confused.

B