Perinephric stranding

Last revised by Dr Muhammad Yousaf on 5 Nov 2023

Citation, DOI, disclosures and article data

Citation:

Dixon A, Yousaf D, Weerakkody Y, et al. Perinephric stranding. Reference article, Radiopaedia.org (Accessed on 19 Apr 2024) https://doi.org/10.53347/rID-36555

DOI:

https://doi.org/10.53347/rID-36555

Permalink:

https://radiopaedia.org/articles/36555

rID:

36555

Article created:

29 Apr 2015, Andrew Dixon ◉

Disclosures:

At the time the article was created Andrew Dixon had no recorded disclosures.

View Andrew Dixon's current disclosures

Last revised:

5 Nov 2023, Dr Muhammad Yousaf

Disclosures:

At the time the article was last revised Dr Muhammad Yousaf had no financial relationships to ineligible companies to disclose.

View Dr Muhammad Yousaf's current disclosures

Revisions:

10 times, by 8 contributors - see full revision history and disclosures

Systems:

Urogenital

Sections:

Signs

Tags:

stub, refs

Synonyms:

Perinephric fat stranding
Perirenal stranding
Perirenal fat stranding
Perirenal fat stranding (PFS)

Perinephric stranding refers to the appearance of edema within the fat of the perirenal space on CT or MRI. While a degree of symmetric bilateral perinephric stranding is common, particularly in the elderly, asymmetric or unilateral perinephric stranding is an important sign of renal inflammation or of acute obstruction. As such, it is seen in conditions such as acute pyelonephritis and with ureteric calculi. Care should be taken to differentiate perinephric stranding from normal perinephric bridging septa. Some papers have also suggested an association with bladder outlet obstruction ³.