Settlement of [l8F]-FDG in the urinary bladder--a new sign

Nucl Med Commun. 2009 Jan;30(1):37-40. doi: 10.1097/MNM.0b013e328313bbfd.


Purpose: Settlement of fluorine-18 fluorodeoxyglucose ([18F]-FDG) in the urinary bladder is often noted in whole body PET/CT scan images with full urinary bladder but never received any careful attention. Purpose of this communication is to determine the clinical utility and application of this unreported phenomenon.

Methods: Four cases seen in the span of two years (2004 to 2006) exhibiting phenomenon of settlement of [18F]-FDG in the urinary bladder are being reported. One case with air in the urinary bladder is also reported to cover the differential diagnosis.

Results: All four patients showing this phenomenon had features of infection in the body/urine.

Conclusion: Presence of this phenomenon demands careful evaluation of the urine by the clinician hence must be reported. This phenomenon can be confusing when there is air in the urinary bladder and this should be ruled out.

Publication types

  • Case Reports

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • Female
  • Fluorodeoxyglucose F18 / metabolism*
  • Humans
  • Male
  • Middle Aged
  • Positron-Emission Tomography
  • Tomography, X-Ray Computed
  • Urinary Bladder / diagnostic imaging
  • Urinary Bladder / metabolism*
  • Urinary Bladder / pathology


  • Fluorodeoxyglucose F18