Biopsy in 3 days; New issue arm lump

Hello!

Biopsy in 3 days. (after a 2 week wait, it can't come quickly enough) My report says:

Group of calcifications of interest in the right breast is relatively tiny, however some are heterogeneous with slight linear configuration and therefore DCIS is on the differential. A couple are punctate/round and therefore benign etiology is also a possibility. Bi-Rads 4. I know this could turn out ok, but can't help feeling anxious. My mom had breast cancer.

In addition to the biopsy worries, I suddenly remembered seeing a small lump on the inside of my very upper arm a few months ago. At the time, we were on a trip and sadly, I did not follow up when we got home. Yes, I am kicking myseIf for actually forgetting about it until the biopsy on the micro calcifications was recommended.

I called and was seen by a nurse practitioner in my doctor's office yesterday. She squeezed around on the lump (painful). She thinks it is a cyst. My arm has been hurting ever since I left her office yesterday. The pain is about a 2 in my upper arm area, but a 7 in my forearm. I plan to point out the lump to the radiologist when I go in for my stereotactic biopsy. This lump is located on the inside of my upper arm, about an inch out from armpit.

Several years ago my sister had a lump on her neck and was told by 2 docs it was a cyst. If not for her gynecologist encouraging her to seek another opinion, her adenoid cystic carcinoma would have gone untreated much longer than it did. Thus, I am skeptical of the nurse practitioner saying mine is just a cyst.

I am really hoping the radiologist will override the nurse practitioner and do an ultrasound on this lump. It would give me peace of mind if an ultrasound could confirm it is a cyst. My mind keeps going to the worse case - the breast biopsy will show cancer and this lump is cancerous. I am trying to keep busy, but getting pretty anxious.