A dowagers hump is a curvature at the base of the neck that develops in older people causing their head to move forward and preventing them from looking up.
dowagers hump does not appear in horses. they can however be 'roach backed'. Where the back is a bit raised and uncomfortable. This is typically a training or conformational defect.
A dowager is a woman of advanced age and may have a tendency to hunch her shoulders thus giving her an appearance she has a bit of a hump.
It is not conclusive, irrefutable proof but, most would accept that the presence of a dowager's hump it is a very strong indication that you are osteoporotic.
Yes
Surgically.
yes
yes it can, it has to be surgically removed.
No, ribs do not grow back if surgically removed. Unlike certain tissues in the body, ribs are bones that do not regenerate after being surgically excised. Once removed, the body may adapt to the absence of the rib, but the bone itself will not reappear.
Appendix
The uterus can be surgically removed through either the vagina or the abdominal wall.
The coccyx can not be removed without after effect pain.