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radiopaedia.org/articles/perinephric-stranding

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.

www.reference.com/health/perinephric-stranding-502b6111f6808d81

Dr. David Schulsinger explains that perinephric fat stranding is a hazy appearance in a linear pattern in the soft tissues in the perinephric space on a computed tomography image. The perinephric space, explains Aizenstein et al. is a cone-shaped compartment that contains the kidney, adrenal glands and perinephric fat.

pubs.rsna.org/doi/full/10.1148/radiographics.20.2.g00mc13439

Subtle perinephric stranding. On an axial CT scan, the interface between the lower pole of the left kidney with the surrounding fat is indistinct, indicating mild stranding of the perinephric fat. In contrast, margins of the lower pole of the right kidney are well defined.

www.answers.com/Q/What_is_perinephric_stranding

Stranding of perinephric fat is defined as linear areas of soft tissue attenuation in the perinephric space, which can result from any acute process or injury to the kidney.

the-health-wellness-blog.blogspot.com/2017/12/perinephric-stranding.html

Spiral CT Scan is the imaging modality of choice in diagnosing perinephric stranding as well as in studying and imaging suspected urinary calculi. The advantage of this imaging mode is in accuracy and rapidness in imaging abdomen in a single procedure.

radiopaedia.org/cases/perinephric-stranding-1

Perinephric stranding is a nonspecific sign pointing to an underlying inflammatory problem with the kidney and/or collecting system. Depending on the situation, it could result from pyelonephritis (usually heterogeneous enhancement in the ipsil...

www.answers.com/Q/What_is_bilateral_perinephric_stranding

Stranding of perinephric fat is defined as linear areas of soft tissue attenuation in the perinephric space, which can result from any acute process or injury to the kidney.

emedicine.medscape.com/article/382530-overview

Secondary signs of obstructive uropathy, including hydronephrosis, perinephric and periureteral stranding, as well as ureterectasis, are well demonstrated on CT. [ 15 , 14 ] Several reports compared unenhanced helical CT with intravenous urography (IVU), the established criterion standard in evaluating the genitourinary system.

www.ajronline.org/doi/full/10.2214/AJR.10.4375

Patterns of Fat Stranding July 2011, VOLUME 197 NUMBER 1 ... and frequently essential, in discovering the underlying cause. Fat stranding is a common finding on CT of the abdomen and, when present, it directs the radiologist's attention to the site of pathology. However, there is a wide differential for this pattern. ... Diffuse Perinephric Fat ...

pubs.rsna.org/doi/full/10.1148/rg.281075171

CT is also the best modality for fully evaluating the secondary signs of renal inflammatory disease and its complications. These signs include focal or global enlargement of the kidney, perinephric stranding, thickening of Gerota fascia, and abscess formation (, Fig 13,) (, 11,, 17,, 20,, 26,, 27).