Stanglebrand maybe, maybe not???
I'm not sure if this B. arborea has Stanglebrand or not. It's similar but not really. I've had Stanglebrand in the past and it usually starts off as a very small lesion and rapidly progresses but seems to affect the upper layers of tissue. This is starting as a large lesion, almost like a tree canker. It's affecting the older woody stems and they are splitting open. I've previously posted pics of Stanglebrand on the forum but can't find them so I linked to BGI's pics. You can see the difference but whatever it is, even if not SB, it's not good. Thankfully this isn't anywhere near my other brugs. I'm not going to dispose of it right off, at least not until I'm positive of the Dx.
Here is a link that might be useful: BGI stanglebrand pics