What anatomy of the bladder is helpful in understanding bladder cancer?

Updated: Feb 23, 2021
  • Author: Kara N Babaian, MD, FACS; Chief Editor: Bradley Fields Schwartz, DO, FACS  more...
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Answer

The bladder is an extraperitoneal muscular urine reservoir that lies behind the pubis symphysis in the pelvis. At the dome of the bladder lies the median umbilical ligament, a fibrous cord that is anchored to the umbilicus and that represents the obliterated urachus (allantois). The ureters, which transport urine from kidney to bladder, approach the bladder obliquely and posterosuperiorly, entering at the trigone (the area between the interureteric ridge and the bladder neck). The intravesical ureteral orifices are roughly 2-3 cm apart and form the superolateral borders of the trigone. 


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