The “bear paw” sign

@article{Segovis2015TheP,
  title={The “bear paw” sign},
  author={Colin M. Segovis and Raymond B Dyer},
  journal={Abdominal Imaging},
  year={2015},
  volume={40},
  pages={2049-2050}
}
The ‘‘bear paw’’ (Fig. 1A, B) metaphorically describes the CT appearance of a kidney diffusely involved with xanthogranulomatous pyelonephritis (XGP), a chronic inflammatory process arising from an incomplete immune response to chronic infection [1, 2]. The bear’s paw pattern reflects replacement of the renal parenchyma by hypoattentuting masses arranged in a ‘‘hydronephrotic’’ pattern (Fig. 2) [3]. The hypoattentuating ‘‘masses’’ are a cellular infiltrate of lipid laden macrophages (‘‘foam… CONTINUE READING
BETA

Figures and Topics from this paper.

Similar Papers

References

Publications referenced by this paper.
SHOWING 1-5 OF 5 REFERENCES

Xanthogranulomatous pyelonephritis

CM Fan, GJ Whitman, FS Chew
  • AJR
  • 1995
VIEW 5 EXCERPTS
HIGHLY INFLUENTIAL

Pyelonephritis: radiologic-pathologic review.

  • Radiographics : a review publication of the Radiological Society of North America, Inc
  • 2008
VIEW 2 EXCERPTS

Classic signs in uroradiology.

  • Radiographics : a review publication of the Radiological Society of North America, Inc
  • 2004