I don't see a tumor or a broken spine.
All I see is a split tail, I wish it was a clearer pic.
To me it look sort of like a Kirin Parrot.
If it is they usually look pretty messed up.
Think Parrot body with all the colors & flowerline of a FH.
If the spine is crooked it probably a deformed fry/cull & this guy couldn't do the deed.