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Original ArticleOpen Access
Extravasation of the Contrast in the Unused Urinary Bladder
Mahayosrwnd A 
,
PantongragBrown L ,
O'Charoen P
,
PantongragBrown L ,
O'Charoen P Ruptured bladder or extravasation from the bladder is almost always associated with trauma.
Spontaneous extravasation is extremely rare with only a few reported cases. All those reported extra-
vasations occurred in the patients diagnosed with end stage renal disease (ESRD) and were self limiting
conditions. During the one-year period of 2001, voiding cystourethrography (VCUG) of 115 patients
were performed in our institution with various indications. The authors found 3 cases with extravasa-
tion of contrast from the bladder during VCUG. All extravasations were occurred in ESRD patients
and the VCUG was performed as part of the routine investigation prior to renal transplantation. The
presented cases shared a similar observation of I) no traumatic catheterization, 2) only minimal and self
limiting extravasation and 3) no immediate or delayed symptom associated with extravasation. The
cause and mechanism of leakage remain uncertain. Hypertonicity and mucosal changes within the
unused bladder were purposed as probably the two main causes of extravasation.
Key word : Extravasation, Unused Bladder
Spontaneous extravasation is extremely rare with only a few reported cases. All those reported extra-
vasations occurred in the patients diagnosed with end stage renal disease (ESRD) and were self limiting
conditions. During the one-year period of 2001, voiding cystourethrography (VCUG) of 115 patients
were performed in our institution with various indications. The authors found 3 cases with extravasa-
tion of contrast from the bladder during VCUG. All extravasations were occurred in ESRD patients
and the VCUG was performed as part of the routine investigation prior to renal transplantation. The
presented cases shared a similar observation of I) no traumatic catheterization, 2) only minimal and self
limiting extravasation and 3) no immediate or delayed symptom associated with extravasation. The
cause and mechanism of leakage remain uncertain. Hypertonicity and mucosal changes within the
unused bladder were purposed as probably the two main causes of extravasation.
Key word : Extravasation, Unused Bladder
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