My son was born with a "cystic hygroma". is it possible to remove all of it?

Depends: Location & the skill of your surgical team will determine the outcome of any surgery for this problem. It can have a single or multiple locations & be small or large. If quite large, several procedures may be needed.

Location?: Cystic hygroma (ch) is a cystic lymphatic lesion that can affect any anatomic subsite in the human body. Doing a quick literature review, it is estimated that complete excision is possible in roughly 40% of cases. It really depends on where it is located on the body and how big it is.