It is called, (suprise suprise!) a cystectomy! As in ovarian cystectomy for example. But you got me thinking - spanish for bladder is vejiga, but no such thing as a vejigectomia (too difficult to pronounce I guess), but all things related to vejiga begin with cisto e.g. cistoscopia, cistectomia, cistitis etc. but then to throw another spanner in the works we have intravejical( intravesical). Think we need to study the origin of words, or has this all been a master plan carried out by physicians to baffle us?
Diane