Doctor stumped - could it be cancer?

I think I posted this in the wrong section just now. My apologies.

I'm 48 and have a history of "innumerable" breast cysts, including three very large and painful ones aspirated in 2006, 2011 and 2012. In fact I was so determined to do whatever i could to try and prevent them, I gave up caffeine in 2012. No small feat!

I just got a call this morning about results from a core needle biopsy of what I originally thought was another cyst flare up (indeed I do have a large simple cyst in the other breast) but these results, the doctor said on the phone that they are stumped, don't know what could cause this, and recommend surgery to remove it and be sure.

I thought I would post here in case anyone else has had a similar experience.

48 years old with recent menopause symptoms including two months since last period. Not on any treatment or meds or birth control. Flare up of cystic feeling pain in both breasts over two months, and then in both breasts I found lumps. While waiting for my imaging appointment one breast became red and extremely painful at the lump. Urgent care said infection, and prescribed antibiotics

MAmmogram and Ultrasound show simple cyst in one breast. But the other, the red breast, showed a solid mass. Though oval and smooth like a cyst. Aspiration attempted but no fluid came out. Core needle biopsy performed. That's the result I got today that the radiology doc is stumped about - says the lab results are benign but "discordant" with the imaging.

* cystic cells

*reactive inflammatory changes (though no current infection)

* infarcted/dead tissue -- not necrotic, she says it's like the blood supply was cut off. But I have had no trauma to the breast that I'm aware of

It seems like the infarcted tissue is what's concerning them. She says a cyst shouldn't have this.

She recommends surgery to remove the mass, to be 100% sure no cancer. which i will likely do to be sure. But any idea what would cause something like thisor what's going on?