Properitoneal fat

Dr Henry Knipe et al.

The properitoneal fat, deep to the transversalis fascia, fills the posterior pararenal space. Laterally it thickens and forms the properitoneal fat pad, which is an anterior extension of posterior pararenal space.

The properitoneal fat pad is known as a plane in surgical anatomy, and as a line or stripe when seen on imaging. It is also referred to frequently as the flank stripe

Abdominal and pelvic anatomy
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Article information

rID: 25218
Section: Anatomy
Synonyms or Alternate Spellings:
  • Properitoneal fat pad
  • Properitoneal fat plane
  • Properitoneal fat line
  • Properitoneal fat stripe
  • Pro-peritoneal fat
  • Flank stripe

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Cases and figures

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    Case 1: x-ray - properitoneal fat
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    Case 2: CT - properitoneal fat herniation
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    Case 3: annotated image
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    Case 4: red arrows
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