diffuse thickening of bladder wall causes
The urinary bladder is a pouch that collects urine from the kidneys. As a result of certain conditions, the bladder wall thickens. Thickened bladder wall causes could be any of the following: 1  Inflammation due to urinary tract infection can cause thickening. 2  This is because the infected tissue accumulates fluids, pus, and other inflammatory debris that makes it swell and look dense.