UMEM Educational Pearls


25 year-old male with the acute onset of right flank pain. Ultrasound of the right flank is shown. What's the diagnosis?


  • This is an ultrasound of the kidney demonstrating moderate to severe hydronephrosis seondary to an obstructing renal stone (not shown)
  • The areas that are anechoic (or black) are the blocked ureter, renal pelvis, and calyces


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