Perirenal cobweb

Perirenal cobwebs are the presence of prominent perinephric septa. It is best appreciated on CT images.

Pathology

The cobweb is considered to be due to engorged venous collaterals or due to oedema and fluid extravasation into the perirenal space 1.

Perirenal cobwebs may be seen in many benign and malignant conditions of the kidney. The commonest cause is acute ureteral obstruction due to a stone. It may also be seen in other situations such as 

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Article information

rID: 25504
System: Urogenital
Section: Signs
Synonyms or Alternate Spellings:
  • Perirenal cobwebs
  • Peri-renal cobweb
  • Perirenal cob web

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Cases and figures

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    Case 2 - transitional cell carcinoma of the renal pelvis
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