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Patient with prenatal hydronephrosis. Lasix renography.

2011
Teaching Case

Case presentation:

  • Male.
  • 3 month old.
  • Second pregnancy. 
  • 20 w US: LK HN, pelvis 22 mm.
  • After delivery: a. US performed day 7th: persistent LK HN. b. LK: Increased size.Pelvis 25 mm . Thin parenchyma.

Teaching points:

  • In case of severe hydronephrosis, activity can persist in the dilated system on the DMSA images obtained 4 hours after tracer injection.
  • In these cases, it is advisable to obtain delayed DMSA images, 24 hours after injection.

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