NCIt definition : Inflammation of the urinary bladder wall leading to urinary frequency, urgency, and
discomfort, pelvic pain, and pain during intercourse. Morphologically it is characterized
by a transmural bladder inflammatory infiltrate containing mast cells.;
Alternative definition : FDA: A chronic bladder condition resulting in recurring discomfort or pain in the
bladder or surrounding pelvic region. Also known as Bladder Pain Syndrome (BPS).;