Putty kidney

A putty kidney refers to a pattern of renal calcification associated with renal tuberculosis conventionally described on plain radiography. The calcification is characteristically very homogeneous and ground glass-like, representing calcified caseous tissue 3,4. Premkumar et al. labeled calcification 'putty-like' if any faint area of uniform calcification was more than 1 cm in diameter 4. Putty calcification needs to be differentiated from a lobar pattern of calcification, wherein dense calcific rims outline the periphery of distorted renal lobes. Lobar calcification represents an end-stage appearance, associated with autonephrectomy.

Article information

rID: 12892
System: Urogenital
Section: Signs
Tag: kidney, tb
Synonyms or Alternate Spellings:
  • Putty kidneys

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Cases and figures

  • Case 1
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  • Case 2: with incidental contralateral nephrolithiasis
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  • Case 3
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  • Case 4
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  • Case 5
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