Thickening on breast, US tomorrow

Hi all,

It has been a while since I posted, but I still read from time to time.

I've had a thickened area on my cancer breast for months. I first assumed it was related to the implant, but it is slowly getting bigger and can even be seen as elevated skin, sometimes pinker than the surrounding skin. The whole area around it feels weird though, and very unlike the other breast. I had a dbl, skin-sparing mastectomy with silicone implant reconstruction, followed by grafting of nipples.

I saw my oncologist last week. She is usually one to shrug things off (to the point I've wondered if I should see someone else). This time, though, she ordered an ultrasound of both breasts and chest wall... she wanted an MRI but insurance required ultrasound first.

Her reason on my order was "new skin nodularity, risk of recurrence."

Hoping someone in here has had a similar symptom that turned out to be scar tissue (it is near my scar and my nipple graft, but not on them or where you would expect NORMAL scar tissue to develop). Have not had fat grafting.

I am MUCH more worried about another surgery - even just to biopsy - than even having cancer again. I have had 5 major surgeries and did not handle the last one well at all. I am extremely scared of another. Plus, I started a new job 3 months ago and they don't know about my history and do not seem tolerant of time off (and I don't even qualify for paid time off yet). They think I am going in for yearly, routine breast exam tomorrow.

The "lump" is ovalish, but not regular shaped. It is firm. It does not hurt. It does not move. It is maybe 1/2 inch by 1/3 inch... but with other odd areas nearby too.

Thoughts?

How accurate are ultrasound at detecting cancer versus scar tissue versus other benign causes?

ETA: I had "extensive" DCIS throughout 90% of breast and also some LCIS, in addition to a small IDC. My margins were clear. I stopped Tamoxifen after 14 months due to side effects.