Cystitis cystica

Cystitis cystica is a rare chronic reactive inflammatory disorder thought to be caused by chronic irritation of the urothelium because of infection, calculi, outlet obstruction, or tumor resulting in multiple small filling defects in the bladder wall. [Source: Wikipedia ]

Synonyms
Cystitis glandularis
May Cause
Cystitis
Focal bladder wall thickening
Small urinary bladder