Paintbrush appearance

Last revised by Mohammadtaghi Niknejad on 10 Jul 2022

A paintbrush appearance describes the streaky appearances of dilated contrast filled tubules within the renal medulla on IVP or CT-IVU. This appearance is characteristic for medullary sponge kidneys.

A similar appearance is also seen in the renal tubular ectasia; though less pronounced.

See also

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Cases and figures

  • Case 1: medullary sponge kidney
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  • Case 2: medullary sponge kidney
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  • Case 3: renal tubular ectasia
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  • Case 4: medullary sponge kidney
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  • Case 5
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