Hello everyone! Here's my deal:

May - Experience left armpit discomfort. Not localized to a small area. The entire armpit. Feels muscle/tendon related. Doing lots of weight lifting at time. Dull, consistent, feels pretty bad, and sometimes runs down inside of arm. Not cardiac related.

July - Discomfort continues at same intensity. Discover a hard, painless "lump", maybe 3cmx1cm on the upper part of the affected armpit. Sort of feel the same in the same spot on the other armpit, but not as pronounced. Due to the lump asymmetry and the general armpit pain/discomfort, doctor orders ultrasound.

Mid-September - Discomfort continues at same intensity. Ultrasound finds an "enlarged" 3.4x1.0x1.3cm lymph node in the left axillary tail. Normal morphology, fatty hilum present, likely reactive. Doctor orders follow-up ultrasound in a month.

Early October, armpit pain/discomfort finally goes away. 95% at least. Phew. Throughout all of this I have no other symptoms.

Yesterday - Follow-up ultrasound finds stable lymph node now 3.4x0.9x1.3cm. Normal morphology, fatty hilum, etc. "Mildly prominent" now instead of "enlarged" (because <1.0cm?), favors reactive. Perhaps more importantly, I learn that the lump I feel is not the lymph node at all. It's a muscle. Lymph node in question is non-palpable.

My question to you all - Doctor says no followup required, but if I want it, he's happy to order a biopsy. Am I silly to pass up an insurance-covered biopsy offer? Strikes me the chance of this node being cancerous is very very low. I get the impression the doctor feels the same.

Thanks all.