A classic feature of interstitial cystitis is the development of glome
ruli during bladder distention while the patient is under anesthesia,
which is thought to be a sign that the bladder was chronically under f
illed before distention. The cause for under filling is pain or sensor
y urgency in interstitial cystitis, and glomeruli have also been assoc
iated with conditions of decreased functional bladder capacity. Two ca
ses of bladder glomeruli associated with severe intrinsic urethral sph
incter deficiency (type 3 incontinence) are reported. Neither patient
had symptoms of interstitial cystitis before or after anti-incontinenc
e surgery. A likely explanation is that severe stress incontinence chr
onically prevented the bladder from filling to capacity before cystosc
opy. Thus, these cases support the premise that glomeruli are a respon
se to distending a previously under filled bladder.