Unaesthetic growth thingy

[Mugwump]

Hi kds,

I was just off on a two month long vacation and returned to find that my lovely guyanan 2 yr old had developed a lumpy extrusion about 3/4 down his length. A beebee under his scales. It's more like a cyst than anything...not attached to the bones and tissue that constitute his innards, but anchored to his skin. Is this I should be concerned about?

Marc