Oops - sorry - I responded last night, but it must not have posted.
No - mine feels pretty attached to the side of my neck. It's like a little rubbery bean. Sometimes it gets bigger, occasionally it gets so small I can barely feel it, but it's usually right around 0.5 - 1 cm. At least three docs have felt my neck around six times AND I had an MRI for another reason, but no one has ever called it out because it's been around the same size for a few years now.