I've posted here before about a lump under my arm. After the first u/s it was diagnosed as a lymph node, but a few weeks later I had a mammo and a f/u u/s and the radiologist (a different one) said he was positive it was NOT a lymph node and was fairly certain it was a cyst. The plan was for me to come back in 3 months to have it re-checked. The report said it was a "2.0 x 1.8 x.0.6 ovid complicated nodule, possible a sebaceous cyst". It was given a BIRAD rating of 3, which is considered "probably benign". What I read online is that a 3 is considered at least a 98% chance of being benign, and that short-term (within 6-months) follow-up is warranted to make sure it hasn't changed.
In a later conversation between my doctor's office and the radiologist who read the second u/s, I was told that the radiologist stated that he really felt it was a cyst. My regular doctor tried to be reassuring by telling me that it was located *just* below the surface of the skin (like 0.3 mm below the skin). He also said it felt like a cyst. When the second tech was doing the u/s she said "oh, that's a cyst".
So, for those of you who know about cysts, do these things sound like a cyst: 1) it moves freely (though it seems to move less in one direction -- I suppose it has to be connected somewhere); 2) it sometimes seems/looks bigger and sometimes seems/looks smaller; and 3) it generally feels sort of firm,but with some give when I squeeze it -- but a few weeks ago it felt MUCH softer for a few days (then went back to feeling firmer). So, can cysts feel different from day-to-day? Are the features I mentioned more consistent with a cyst than with something bad? Is there anything you can say to reassure me?
My 3-months is the 3rd week in November, but I am so busy with Thanksgiving/Hanukkah that week, that I want to wait until the first week in December (basically an additional 2.5 weeks). I am worried that this is a bad decision.
Help me get back to a good place with this?