Around Christmas time I discovered a lump at the top of my neck but in my hair it was the size of a 5p.  I went to my doctor who thought it was a lump in lymph node as I had just had a cold she said to monitor it to see if it went down.  A month later I went back to the doctors as the lump had not gone down and they arranged for me to have an ultra-sound she then said she thought it was a cyst.  I have had the ultra-sound and it came back as inconclusive as they could not see anything however they said it is nothing nasty as they cannot find anything on the ultra-sound but the lump has now grown to the size of a 1p.  I have gone back to the doctors and they are going to do a full blood count and also a thyroid test as I have a ping-pong ball size swelling in the lower front of my throat as well.  The doctors said as the lump is the small they would not worry about it.  Would a blood test pick up if there is anything nasty going on with this lump or should I push for more tests as my doctors as a little dismissive of it.

Thanks