Renal calculus - IVU control image

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Renal calculus - IVU control image

  • This image shows a single focus of calcific density projected over the left kidney.
  • Further investigation is required to determine if this is located within the renal collecting system.
  • In this patient an Intravenous Urogram (IVU) was performed - see below.

Renal calculus - IVU image

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Renal calculus - IVU image

  • (Same patient as image above)
  • Following intravenous injection of contrast material the outlines of the kidneys and collecting systems are demonstrated. This helps to determine if a suspected stone is within the collecting system.
  • In this case the renal stone (calculus) - which is less dense than the surrounding contrast material - appears as a filling defect in the renal pelvis.

Staghorn calculus

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Staghorn calculus

  • Renal stones may be so large they partly or completely fill the renal pelvis and calyces, taking on the form of a staghorn.
  • Both these calculi can be described as 'staghorn', the one on the right being particularly large.

Nephrocalcinosis

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Nephrocalcinosis

  • Nephrocalcinosis is an uncommon form of renal calcification. Calcified material is seen in the renal parenchyma itself rather than in the collecting system.