Last summer I noticed my 8 year old Sylvester Palm was looking strange, the base of the trunk was getting a lot of new growth but not the rest of the tree trunk. I stopped by KB Nursery on CR 462 with some photos of the tree. They gave me website address for the University of Florida Sumter County Extension in Bushnell. I emailed the photos to the attention of Jim Davis and within a couple of days he replied with a response. The tree was fine, and just needed trimming, but the growth was normal.
Here's their website, use the contact email attn: Jim Davis
Sumter County - UF/IFAS Extension