Matea had another follow up ultrasound on the lump in her neck. It was three months from her last ultrasound and 7 months from the time Steve first found the lump. Once again, it was pretty much the same size. Of the three measurements, one was a millimeter smaller, one was a millimeter bigger, and one was the same.
The doctor scheduled us to come back in six months for another ultrasound and just told me to check it once a month to make sure it isn't growing. He said he still feels strongly that it's just a large lymph node and if it were his kid, he would just leave it alone. But then he has to thrown in, "...but it could be something and you could choose to remove it." Gee, thanks a lot doc.
I've broken all rules and researched some on the internet and really feel strongly now that it is nothing. Matea has no symptoms of illness, no other lumps, and the one she does have isn't growing and doesn't have any blood flow to it. That said, we're still considering the possibility of getting a second opion and I'll discuss that with her pediatrician later this month.