I would also add that looking at your pics of the tree.. that the deformity looks like it is where the tree starts to bend or lean ..
This can also cause deformity due to the stress of the lean in the tree. Like a weak spot that healed over later. If that makes any sense.
I could be barkin up...
As far as I can tell, a canker is usually more of an open wound on the tree and is also associated from one cause or another to decay. I have seen this kind of growth on some white oaks and live oaks and usually it is more from a physical wound that has healed deforming the cambium and bark...
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