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Balloon on a string sign (ureter)

The balloon on a string sign refers to the appearance of the ureter on intravenous urography in ureteropelvic junction obstruction. It is seen due to the high and eccentric point of the exit of ureter from a dilated renal pelvis. 

Article information

rID: 25544
System: Urogenital
Section: Signs
Tag: stub, cases, refs
Synonyms or Alternate Spellings:
  • Balloon on a string sign - renal

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