question: I have a lump on my right side of my neck near my collar bone...no larger than 1 cm... its been there for years and its not growing in size.... went to the er they said it was nothing and its too small to do a biopsy on.... I am curious what it could be. I have neck pain and its hurts to swalow...could this be a sinus infection? I have always had the lump but now..odd things are happening...would appreciate any info! Thanks