Thank you for your query.
(lump) you might have is abnormal. If the doctor does not think it is a lymph
node then a diagnosis needs to be made. There are basically two ways of going about this 1) non-invasive for instance by using ultrasound
2) invasive , by cutting it out or taking a biopsy
. The important point is that a diagnosis needs to be made, whatever needs to be done to arrive at the diagnosis, one can't just leave it.
I trust this information is helpful.