I have only begun to read what you posted but it looks to be very informative and useful! Thank you!
My mom has been to the doctor many times for it and they have said they could drain it but that was all they needed to do until or unless things changed. I forget what she said they call it. In any case it is almost completely gone and cant be seen or felt by her at all. The doctor did but said it was like a pea size now.