I have the exact same thing, I'm 18 female. My right armpit is very very swollen, and right above my elbow on my inner arm there is a lump about the size of a golf ball. I have had this for about a year or so, and it has started to grow and hurt very bad. I'm going to the ER tomorrow to get a biopsy of it and they are going to do a ct scan and chec... more